77012069 has 2 divisors, whose sum is σ = 77012070. Its totient is φ = 77012068.

The previous prime is 77012053. The next prime is 77012087. The reversal of 77012069 is 96021077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50951044 + 26061025 = 7138^2 + 5105^2 .

It is a cyclic number.

It is not a de Polignac number, because 77012069 - 2⁴ = 77012053 is a prime.

It is a super-2 number, since 2×77012069² = 11861717543321522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77012009) 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, 38506034 + 38506035.

It is an arithmetic number, because the mean of its divisors is an integer number (38506035).

Almost surely, 2^77012069 is an apocalyptic number.

It is an amenable number.

77012069 is a deficient number, since it is larger than the sum of its proper divisors (1).

77012069 is an equidigital number, since it uses as much as digits as its factorization.

77012069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 77012069 is about 8775.6520555455. The cubic root of 77012069 is about 425.4543127955.

The spelling of 77012069 in words is "seventy-seven million, twelve thousand, sixty-nine".