77399690 has 8 divisors (see below), whose sum is σ = 139319460. Its totient is φ = 30959872.

The previous prime is 77399687. The next prime is 77399713. The reversal of 77399690 is 9699377.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63568729 + 13830961 = 7973^2 + 3719^2 .

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

It is a super-2 number, since 2×77399690² = 11981424024192200, which contains 22 as substring.

It is an unprimeable number.

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, 3869975 + ... + 3869994.

Almost surely, 2^77399690 is an apocalyptic number.

77399690 is a deficient number, since it is larger than the sum of its proper divisors (61919770).

77399690 is a wasteful number, since it uses less digits than its factorization.

77399690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7739976.

The product of its (nonzero) digits is 642978, while the sum is 50.

The square root of 77399690 is about 8797.7093609644. The cubic root of 77399690 is about 426.1669245252.

The spelling of 77399690 in words is "seventy-seven million, three hundred ninety-nine thousand, six hundred ninety".