77956969 has 8 divisors (see below), whose sum is σ = 79073280. Its totient is φ = 76846176.

The previous prime is 77956939. The next prime is 77956997. The reversal of 77956969 is 96965977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77956969 - 2¹³ = 77948777 is a prime.

It is a super-2 number, since 2×77956969² = 12154578031333922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77956939) 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 in 7 ways as a sum of consecutive naturals, for example, 32944 + ... + 35230.

It is an arithmetic number, because the mean of its divisors is an integer number (9884160).

Almost surely, 2^77956969 is an apocalyptic number.

It is an amenable number.

77956969 is a deficient number, since it is larger than the sum of its proper divisors (1116311).

77956969 is a wasteful number, since it uses less digits than its factorization.

77956969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759.

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

The square root of 77956969 is about 8829.3243795887. The cubic root of 77956969 is about 427.1872824450.

The spelling of 77956969 in words is "seventy-seven million, nine hundred fifty-six thousand, nine hundred sixty-nine".