77620995 has 24 divisors (see below), whose sum is σ = 137827872. Its totient is φ = 40387200.

The previous prime is 77620987. The next prime is 77621009. The reversal of 77620995 is 59902677.

It is not a de Polignac number, because 77620995 - 2³ = 77620987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 77620995.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19191 + ... + 22880.

It is an arithmetic number, because the mean of its divisors is an integer number (5742828).

Almost surely, 2^77620995 is an apocalyptic number.

77620995 is a deficient number, since it is larger than the sum of its proper divisors (60206877).

77620995 is a wasteful number, since it uses less digits than its factorization.

77620995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42123 (or 42120 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 77620995 is about 8810.2778049276. The cubic root of 77620995 is about 426.5727104991.

The spelling of 77620995 in words is "seventy-seven million, six hundred twenty thousand, nine hundred ninety-five".