77976745 has 32 divisors (see below), whose sum is σ = 117202176. Its totient is φ = 48384000.

The previous prime is 77976733. The next prime is 77976761. The reversal of 77976745 is 54767977.

It is not a de Polignac number, because 77976745 - 2¹⁵ = 77943977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77976692 and 77976701.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 129445 + ... + 130045.

It is an arithmetic number, because the mean of its divisors is an integer number (3662568).

Almost surely, 2^77976745 is an apocalyptic number.

It is an amenable number.

77976745 is a deficient number, since it is larger than the sum of its proper divisors (39225431).

77976745 is a wasteful number, since it uses less digits than its factorization.

77976745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961.

The product of its digits is 2593080, while the sum is 52.

The square root of 77976745 is about 8830.4442130620. Note that the first 3 decimals coincide. The cubic root of 77976745 is about 427.2234021212.

The spelling of 77976745 in words is "seventy-seven million, nine hundred seventy-six thousand, seven hundred forty-five".