612659867 has 2 divisors, whose sum is σ = 612659868. Its totient is φ = 612659866.

The previous prime is 612659683. The next prime is 612659869. The reversal of 612659867 is 768956216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 612659867 - 2²⁶ = 545551003 is a prime.

It is a super-2 number, since 2×612659867² = 750704225264915378, which contains 22 as substring.

Together with 612659869, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (612659869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306329933 + 306329934.

It is an arithmetic number, because the mean of its divisors is an integer number (306329934).

Almost surely, 2^612659867 is an apocalyptic number.

612659867 is a deficient number, since it is larger than the sum of its proper divisors (1).

612659867 is an equidigital number, since it uses as much as digits as its factorization.

612659867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 612659867 is about 24751.9669319430. The cubic root of 612659867 is about 849.3235064908.

The spelling of 612659867 in words is "six hundred twelve million, six hundred fifty-nine thousand, eight hundred sixty-seven".