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84406991 is a prime number
BaseRepresentation
bin1010000011111…
…11001011001111
312212211022121212
411001333023033
5133102010431
612213045035
72043306344
oct501771317
9185738555
1084406991
1143711249
122432677b
1314644286
14b2d27cb
15762472b
hex507f2cf

84406991 has 2 divisors, whose sum is σ = 84406992. Its totient is φ = 84406990.

The previous prime is 84406951. The next prime is 84407009. The reversal of 84406991 is 19960448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84406991 - 218 = 84144847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84406901) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42203495 + 42203496.

It is an arithmetic number, because the mean of its divisors is an integer number (42203496).

Almost surely, 284406991 is an apocalyptic number.

84406991 is a deficient number, since it is larger than the sum of its proper divisors (1).

84406991 is an equidigital number, since it uses as much as digits as its factorization.

84406991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 84406991 is about 9187.3277398817. The cubic root of 84406991 is about 438.6580861729.

The spelling of 84406991 in words is "eighty-four million, four hundred six thousand, nine hundred ninety-one".