83771964 has 36 divisors (see below), whose sum is σ = 213293080. Its totient is φ = 27721440.

The previous prime is 83771939. The next prime is 83771993. The reversal of 83771964 is 46917738.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3367 + ... + 13374.

Almost surely, 2^83771964 is an apocalyptic number.

It is an amenable number.

83771964 is an abundant number, since it is smaller than the sum of its proper divisors (129521116).

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

83771964 is a wasteful number, since it uses less digits than its factorization.

83771964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16890 (or 16885 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 83771964 is about 9152.7025517057. The cubic root of 83771964 is about 437.5552500564. Note that the first 3 decimals are identical.

The spelling of 83771964 in words is "eighty-three million, seven hundred seventy-one thousand, nine hundred sixty-four".