77719492 has 6 divisors (see below), whose sum is σ = 136009118. Its totient is φ = 38859744.

The previous prime is 77719483. The next prime is 77719493. The reversal of 77719492 is 29491777.

It can be written as a sum of positive squares in only one way, i.e., 53670276 + 24049216 = 7326^2 + 4904^2 .

It is not an unprimeable number, because it can be changed into a prime (77719493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714933 + ... + 9714940.

Almost surely, 2^77719492 is an apocalyptic number.

It is an amenable number.

77719492 is a deficient number, since it is larger than the sum of its proper divisors (58289626).

77719492 is a wasteful number, since it uses less digits than its factorization.

77719492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19429877 (or 19429875 counting only the distinct ones).

The product of its digits is 222264, while the sum is 46.

The square root of 77719492 is about 8815.8659245703. The cubic root of 77719492 is about 426.7530670838.

The spelling of 77719492 in words is "seventy-seven million, seven hundred nineteen thousand, four hundred ninety-two".