264694987 has 2 divisors, whose sum is σ = 264694988. Its totient is φ = 264694986.

The previous prime is 264694973. The next prime is 264695009. The reversal of 264694987 is 789496462.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264694987 is a prime.

It is a super-2 number, since 2×264694987² = 140126872285860338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (264694907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132347493 + 132347494.

It is an arithmetic number, because the mean of its divisors is an integer number (132347494).

Almost surely, 2^264694987 is an apocalyptic number.

264694987 is a deficient number, since it is larger than the sum of its proper divisors (1).

264694987 is an equidigital number, since it uses as much as digits as its factorization.

264694987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 55.

The square root of 264694987 is about 16269.4494989843. The cubic root of 264694987 is about 642.0693006909.

The spelling of 264694987 in words is "two hundred sixty-four million, six hundred ninety-four thousand, nine hundred eighty-seven".