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89724131 = 712817733
BaseRepresentation
bin1010101100100…
…01010011100011
320020211110100222
411112101103203
5140432133011
612523033255
72136433250
oct526212343
9206743328
1089724131
1146713082
122606b82b
1315786503
14bcb8427
157d24ddb
hex55914e3

89724131 has 4 divisors (see below), whose sum is σ = 102541872. Its totient is φ = 76906392.

The previous prime is 89724121. The next prime is 89724133. The reversal of 89724131 is 13142798.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 89724131 - 222 = 85529827 is a prime.

It is a super-2 number, since 2×897241312 = 16100839367410322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89724091 and 89724100.

It is not an unprimeable number, because it can be changed into a prime (89724133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6408860 + ... + 6408873.

It is an arithmetic number, because the mean of its divisors is an integer number (25635468).

Almost surely, 289724131 is an apocalyptic number.

89724131 is a deficient number, since it is larger than the sum of its proper divisors (12817741).

89724131 is a wasteful number, since it uses less digits than its factorization.

89724131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12817740.

The product of its digits is 12096, while the sum is 35.

The square root of 89724131 is about 9472.2822487508. The cubic root of 89724131 is about 447.6821243019.

The spelling of 89724131 in words is "eighty-nine million, seven hundred twenty-four thousand, one hundred thirty-one".

Divisors: 1 7 12817733 89724131