16319957 has 4 divisors (see below), whose sum is σ = 16340940. Its totient is φ = 16298976.

The previous prime is 16319911. The next prime is 16319969. The reversal of 16319957 is 75991361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75991361 = 4099 ⋅18539.

It can be written as a sum of positive squares in 2 ways, for example, as 15689521 + 630436 = 3961^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 16319957 - 2¹⁰ = 16318933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16319977) 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, 9278 + ... + 10895.

It is an arithmetic number, because the mean of its divisors is an integer number (4085235).

Almost surely, 2^16319957 is an apocalyptic number.

It is an amenable number.

16319957 is a deficient number, since it is larger than the sum of its proper divisors (20983).

16319957 is an equidigital number, since it uses as much as digits as its factorization.

16319957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20982.

The product of its digits is 51030, while the sum is 41.

The square root of 16319957 is about 4039.7966532983. The cubic root of 16319957 is about 253.6528054399.

The spelling of 16319957 in words is "sixteen million, three hundred nineteen thousand, nine hundred fifty-seven".