16162991 has 12 divisors (see below), whose sum is σ = 17809560. Its totient is φ = 14657760.

The previous prime is 16162973. The next prime is 16162999. The reversal of 16162991 is 19926161.

It is a de Polignac number, because none of the positive numbers 2^k-16162991 is a prime.

It is a super-2 number, since 2×16162991² = 522484556132162, 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 (16162999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9161 + ... + 10781.

It is an arithmetic number, because the mean of its divisors is an integer number (1484130).

Almost surely, 2^16162991 is an apocalyptic number.

16162991 is a deficient number, since it is larger than the sum of its proper divisors (1646569).

16162991 is a wasteful number, since it uses less digits than its factorization.

16162991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706 (or 1693 counting only the distinct ones).

The product of its digits is 5832, while the sum is 35.

The square root of 16162991 is about 4020.3222507655. The cubic root of 16162991 is about 252.8369699627.

The spelling of 16162991 in words is "sixteen million, one hundred sixty-two thousand, nine hundred ninety-one".