76690391 has 2 divisors, whose sum is σ = 76690392. Its totient is φ = 76690390.

The previous prime is 76690387. The next prime is 76690399. The reversal of 76690391 is 19309667.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 76690391 - 2² = 76690387 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76690399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38345195 + 38345196.

It is an arithmetic number, because the mean of its divisors is an integer number (38345196).

Almost surely, 2^76690391 is an apocalyptic number.

76690391 is a deficient number, since it is larger than the sum of its proper divisors (1).

76690391 is an equidigital number, since it uses as much as digits as its factorization.

76690391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 76690391 is about 8757.3050078206. The cubic root of 76690391 is about 424.8611144802.

The spelling of 76690391 in words is "seventy-six million, six hundred ninety thousand, three hundred ninety-one".