77005969 has 2 divisors, whose sum is σ = 77005970. Its totient is φ = 77005968.

The previous prime is 77005963. The next prime is 77006003. The reversal of 77005969 is 96950077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70308225 + 6697744 = 8385^2 + 2588^2 .

It is a cyclic number.

It is not a de Polignac number, because 77005969 - 2¹⁵ = 76973201 is a prime.

It is a super-2 number, since 2×77005969² = 11859838523257922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77005963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38502984 + 38502985.

It is an arithmetic number, because the mean of its divisors is an integer number (38502985).

Almost surely, 2^77005969 is an apocalyptic number.

It is an amenable number.

77005969 is a deficient number, since it is larger than the sum of its proper divisors (1).

77005969 is an equidigital number, since it uses as much as digits as its factorization.

77005969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119070, while the sum is 43.

The square root of 77005969 is about 8775.3044961414. The cubic root of 77005969 is about 425.4430793189.

The spelling of 77005969 in words is "seventy-seven million, five thousand, nine hundred sixty-nine".