16157397 has 8 divisors (see below), whose sum is σ = 21741280. Its totient is φ = 10672560.

The previous prime is 16157389. The next prime is 16157413. The reversal of 16157397 is 79375161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16157397 - 2³ = 16157389 is a prime.

It is a super-2 number, since 2×16157397² = 522122955631218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16157347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24379 + ... + 25032.

It is an arithmetic number, because the mean of its divisors is an integer number (2717660).

Almost surely, 2^16157397 is an apocalyptic number.

It is an amenable number.

16157397 is a deficient number, since it is larger than the sum of its proper divisors (5583883).

16157397 is a wasteful number, since it uses less digits than its factorization.

16157397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49523.

The product of its digits is 39690, while the sum is 39.

The square root of 16157397 is about 4019.6264751840. The cubic root of 16157397 is about 252.8077976968.

The spelling of 16157397 in words is "sixteen million, one hundred fifty-seven thousand, three hundred ninety-seven".