83721974 has 16 divisors (see below), whose sum is σ = 151966368. Its totient is φ = 33770112.

The previous prime is 83721949. The next prime is 83721997. The reversal of 83721974 is 47912738.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175649 + ... + 176124.

It is an arithmetic number, because the mean of its divisors is an integer number (9497898).

Almost surely, 2^83721974 is an apocalyptic number.

83721974 is a deficient number, since it is larger than the sum of its proper divisors (68244394).

83721974 is a wasteful number, since it uses less digits than its factorization.

83721974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351799.

The product of its digits is 84672, while the sum is 41.

The square root of 83721974 is about 9149.9712567855. The cubic root of 83721974 is about 437.4681973073.

The spelling of 83721974 in words is "eighty-three million, seven hundred twenty-one thousand, nine hundred seventy-four".