76780969 has 8 divisors (see below), whose sum is σ = 81135360. Its totient is φ = 72511296.

The previous prime is 76780961. The next prime is 76780973. The reversal of 76780969 is 96908767.

76780969 = 142² + 143² + ... + 615².

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 76780969 - 2³ = 76780961 is a prime.

It is a super-2 number, since 2×76780969² = 11790634401157922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76780961) 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, 19312 + ... + 22945.

It is an arithmetic number, because the mean of its divisors is an integer number (10141920).

Almost surely, 2^76780969 is an apocalyptic number.

76780969 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

76780969 is a deficient number, since it is larger than the sum of its proper divisors (4354391).

76780969 is a wasteful number, since it uses less digits than its factorization.

76780969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42359.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 76780969 is about 8762.4750498932. The cubic root of 76780969 is about 425.0283146072.

The spelling of 76780969 in words is "seventy-six million, seven hundred eighty thousand, nine hundred sixty-nine".