16523957 has 2 divisors, whose sum is σ = 16523958. Its totient is φ = 16523956.

The previous prime is 16523933. The next prime is 16523971. The reversal of 16523957 is 75932561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9480241 + 7043716 = 3079^2 + 2654^2 .

It is a cyclic number.

It is not a de Polignac number, because 16523957 - 2⁶ = 16523893 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16523957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16523917) 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 as a sum of consecutive naturals, namely, 8261978 + 8261979.

It is an arithmetic number, because the mean of its divisors is an integer number (8261979).

Almost surely, 2^16523957 is an apocalyptic number.

It is an amenable number.

16523957 is a deficient number, since it is larger than the sum of its proper divisors (1).

16523957 is an equidigital number, since it uses as much as digits as its factorization.

16523957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 38.

The square root of 16523957 is about 4064.9670355367. The cubic root of 16523957 is about 254.7053215251.

The spelling of 16523957 in words is "sixteen million, five hundred twenty-three thousand, nine hundred fifty-seven".