76680397 has 4 divisors (see below), whose sum is σ = 76811616. Its totient is φ = 76549180.

The previous prime is 76680389. The next prime is 76680419. The reversal of 76680397 is 79308667.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79308667 = 5119 ⋅15493.

It is a cyclic number.

It is not a de Polignac number, because 76680397 - 2³ = 76680389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76680337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64729 + ... + 65902.

It is an arithmetic number, because the mean of its divisors is an integer number (19202904).

Almost surely, 2^76680397 is an apocalyptic number.

It is an amenable number.

76680397 is a deficient number, since it is larger than the sum of its proper divisors (131219).

76680397 is a wasteful number, since it uses less digits than its factorization.

76680397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131218.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 76680397 is about 8756.7343798930. The cubic root of 76680397 is about 424.8426582504.

It can be divided in two parts, 76680 and 397, that added together give a palindrome (77077).

The spelling of 76680397 in words is "seventy-six million, six hundred eighty thousand, three hundred ninety-seven".