77521982 has 8 divisors (see below), whose sum is σ = 116321616. Its totient is φ = 38748112.

The previous prime is 77521973. The next prime is 77522059. The reversal of 77521982 is 28912577.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5543 + ... + 13629.

It is an arithmetic number, because the mean of its divisors is an integer number (14540202).

Almost surely, 2^77521982 is an apocalyptic number.

77521982 is a deficient number, since it is larger than the sum of its proper divisors (38799634).

77521982 is a wasteful number, since it uses less digits than its factorization.

77521982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12882.

The product of its digits is 70560, while the sum is 41.

The square root of 77521982 is about 8804.6568360158. The cubic root of 77521982 is about 426.3912552312.

The spelling of 77521982 in words is "seventy-seven million, five hundred twenty-one thousand, nine hundred eighty-two".