76978007 has 2 divisors, whose sum is σ = 76978008. Its totient is φ = 76978006.

The previous prime is 76977961. The next prime is 76978009. The reversal of 76978007 is 70087967.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 76978007 - 2²⁰ = 75929431 is a prime.

It is a super-2 number, since 2×76978007² = 11851227123384098, which contains 22 as substring.

Together with 76978009, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76978009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38489003 + 38489004.

It is an arithmetic number, because the mean of its divisors is an integer number (38489004).

Almost surely, 2^76978007 is an apocalyptic number.

76978007 is a deficient number, since it is larger than the sum of its proper divisors (1).

76978007 is an equidigital number, since it uses as much as digits as its factorization.

76978007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 76978007 is about 8773.7111304168. The cubic root of 76978007 is about 425.3915782049.

The spelling of 76978007 in words is "seventy-six million, nine hundred seventy-eight thousand, seven".