787630979 has 4 divisors (see below), whose sum is σ = 795750984. Its totient is φ = 779510976.

The previous prime is 787630889. The next prime is 787630999. The reversal of 787630979 is 979036787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979036787 = 349 ⋅2805263.

It is a cyclic number.

It is not a de Polignac number, because 787630979 - 2¹² = 787626883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (787630999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4059857 + ... + 4060050.

It is an arithmetic number, because the mean of its divisors is an integer number (198937746).

Almost surely, 2^787630979 is an apocalyptic number.

787630979 is a deficient number, since it is larger than the sum of its proper divisors (8120005).

787630979 is an equidigital number, since it uses as much as digits as its factorization.

787630979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8120004.

The product of its (nonzero) digits is 4000752, while the sum is 56.

The square root of 787630979 is about 28064.7640111226. The cubic root of 787630979 is about 923.5085696444.

The spelling of 787630979 in words is "seven hundred eighty-seven million, six hundred thirty thousand, nine hundred seventy-nine".