76579969 has 2 divisors, whose sum is σ = 76579970. Its totient is φ = 76579968.

The previous prime is 76579963. The next prime is 76580011. The reversal of 76579969 is 96997567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68807025 + 7772944 = 8295^2 + 2788^2 .

It is an emirp because it is prime and its reverse (96997567) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76579969 - 2⁹ = 76579457 is a prime.

It is a super-2 number, since 2×76579969² = 11728983304081922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (76579963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38289984 + 38289985.

It is an arithmetic number, because the mean of its divisors is an integer number (38289985).

Almost surely, 2^76579969 is an apocalyptic number.

It is an amenable number.

76579969 is a deficient number, since it is larger than the sum of its proper divisors (1).

76579969 is an equidigital number, since it uses as much as digits as its factorization.

76579969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6429780, while the sum is 58.

The square root of 76579969 is about 8750.9981716373. The cubic root of 76579969 is about 424.6571056613.

The spelling of 76579969 in words is "seventy-six million, five hundred seventy-nine thousand, nine hundred sixty-nine".