67904779 has 2 divisors, whose sum is σ = 67904780. Its totient is φ = 67904778.

The previous prime is 67904761. The next prime is 67904789. The reversal of 67904779 is 97740976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67904779 - 2¹⁷ = 67773707 is a prime.

It is a super-2 number, since 2×67904779² = 9222118022077682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67904729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33952389 + 33952390.

It is an arithmetic number, because the mean of its divisors is an integer number (33952390).

Almost surely, 2^67904779 is an apocalyptic number.

67904779 is a deficient number, since it is larger than the sum of its proper divisors (1).

67904779 is an equidigital number, since it uses as much as digits as its factorization.

67904779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 67904779 is about 8240.4356074179. The cubic root of 67904779 is about 407.9749019388.

The spelling of 67904779 in words is "sixty-seven million, nine hundred four thousand, seven hundred seventy-nine".