264190691 has 2 divisors, whose sum is σ = 264190692. Its totient is φ = 264190690.

The previous prime is 264190681. The next prime is 264190699. The reversal of 264190691 is 196091462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 264190691 - 2²⁶ = 197081827 is a prime.

It is a super-2 number, since 2×264190691² = 139593442422114962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (264190699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132095345 + 132095346.

It is an arithmetic number, because the mean of its divisors is an integer number (132095346).

Almost surely, 2^264190691 is an apocalyptic number.

264190691 is a deficient number, since it is larger than the sum of its proper divisors (1).

264190691 is an equidigital number, since it uses as much as digits as its factorization.

264190691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 264190691 is about 16253.9438598760. The cubic root of 264190691 is about 641.6612853731.

The spelling of 264190691 in words is "two hundred sixty-four million, one hundred ninety thousand, six hundred ninety-one".