77995983 has 32 divisors (see below), whose sum is σ = 121153536. Its totient is φ = 44195328.

The previous prime is 77995979. The next prime is 77995997. The reversal of 77995983 is 38959977.

It is not a de Polignac number, because 77995983 - 2² = 77995979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77995903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29910 + ... + 32412.

It is an arithmetic number, because the mean of its divisors is an integer number (3786048).

Almost surely, 2^77995983 is an apocalyptic number.

77995983 is a deficient number, since it is larger than the sum of its proper divisors (43157553).

77995983 is a wasteful number, since it uses less digits than its factorization.

77995983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583.

The product of its digits is 4286520, while the sum is 57.

The square root of 77995983 is about 8831.5334455575. The cubic root of 77995983 is about 427.2585333131.

The spelling of 77995983 in words is "seventy-seven million, nine hundred ninety-five thousand, nine hundred eighty-three".