90452731 has 4 divisors (see below), whose sum is σ = 90921592. Its totient is φ = 89983872.

The previous prime is 90452729. The next prime is 90452737. The reversal of 90452731 is 13725409.

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 90452731 - 2¹ = 90452729 is a prime.

It is a super-2 number, since 2×90452731² = 16363393090716722, 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 = 90452693 and 90452702.

It is not an unprimeable number, because it can be changed into a prime (90452737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234141 + ... + 234526.

It is an arithmetic number, because the mean of its divisors is an integer number (22730398).

Almost surely, 2^90452731 is an apocalyptic number.

90452731 is a deficient number, since it is larger than the sum of its proper divisors (468861).

90452731 is a wasteful number, since it uses less digits than its factorization.

90452731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468860.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 90452731 is about 9510.6640672458. The cubic root of 90452731 is about 448.8906518241.

It can be divided in two parts, 904 and 52731, that added together give a palindrome (53635).

The spelling of 90452731 in words is "ninety million, four hundred fifty-two thousand, seven hundred thirty-one".