16165091 has 2 divisors, whose sum is σ = 16165092. Its totient is φ = 16165090.

The previous prime is 16165073. The next prime is 16165109. The reversal of 16165091 is 19056161.

Together with next prime (16165109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (16165073) and next prime (16165109).

It is a cyclic number.

It is not a de Polignac number, because 16165091 - 2¹⁰ = 16164067 is a prime.

It is a super-2 number, since 2×16165091² = 522620334076562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16165001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8082545 + 8082546.

It is an arithmetic number, because the mean of its divisors is an integer number (8082546).

Almost surely, 2^16165091 is an apocalyptic number.

16165091 is a deficient number, since it is larger than the sum of its proper divisors (1).

16165091 is an equidigital number, since it uses as much as digits as its factorization.

16165091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 16165091 is about 4020.5834153764. The cubic root of 16165091 is about 252.8479195583.

The spelling of 16165091 in words is "sixteen million, one hundred sixty-five thousand, ninety-one".