16157729 has 4 divisors (see below), whose sum is σ = 18465984. Its totient is φ = 13849476.

The previous prime is 16157719. The next prime is 16157761. The reversal of 16157729 is 92775161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16157729 is a prime.

It is a super-2 number, since 2×16157729² = 522144412874882, 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 = 16157692 and 16157701.

It is not an unprimeable number, because it can be changed into a prime (16157719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1154117 + ... + 1154130.

It is an arithmetic number, because the mean of its divisors is an integer number (4616496).

Almost surely, 2^16157729 is an apocalyptic number.

It is an amenable number.

16157729 is a deficient number, since it is larger than the sum of its proper divisors (2308255).

16157729 is an equidigital number, since it uses as much as digits as its factorization.

16157729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308254.

The product of its digits is 26460, while the sum is 38.

The square root of 16157729 is about 4019.6677723414. The cubic root of 16157729 is about 252.8095292384.

The spelling of 16157729 in words is "sixteen million, one hundred fifty-seven thousand, seven hundred twenty-nine".