83979970 has 16 divisors (see below), whose sum is σ = 151540920. Its totient is φ = 33508224.

The previous prime is 83979901. The next prime is 83979979. The reversal of 83979970 is 7997938.

It can be written as a sum of positive squares in 4 ways, for example, as 82682649 + 1297321 = 9093^2 + 1139^2 .

It is a super-2 number, since 2×83979970² = 14105270722401800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83979979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6177 + ... + 14356.

Almost surely, 2^83979970 is an apocalyptic number.

83979970 is a deficient number, since it is larger than the sum of its proper divisors (67560950).

83979970 is a wasteful number, since it uses less digits than its factorization.

83979970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20949.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 83979970 is about 9164.0585986778. The cubic root of 83979970 is about 437.9171009960.

The spelling of 83979970 in words is "eighty-three million, nine hundred seventy-nine thousand, nine hundred seventy".