77981934 has 8 divisors (see below), whose sum is σ = 155963880. Its totient is φ = 25993976.

The previous prime is 77981933. The next prime is 77981951. The reversal of 77981934 is 43918977.

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

77981934 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77981933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6498489 + ... + 6498500.

It is an arithmetic number, because the mean of its divisors is an integer number (19495485).

Almost surely, 2^77981934 is an apocalyptic number.

77981934 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77981934 is a wasteful number, since it uses less digits than its factorization.

77981934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12996994.

The product of its digits is 381024, while the sum is 48.

The square root of 77981934 is about 8830.7380212528. The cubic root of 77981934 is about 427.2328785066.

The spelling of 77981934 in words is "seventy-seven million, nine hundred eighty-one thousand, nine hundred thirty-four".