84579812 has 6 divisors (see below), whose sum is σ = 148014678. Its totient is φ = 42289904.

The previous prime is 84579791. The next prime is 84579851. The reversal of 84579812 is 21897548.

It can be written as a sum of positive squares in only one way, i.e., 84529636 + 50176 = 9194^2 + 224^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572473 + ... + 10572480.

It is an arithmetic number, because the mean of its divisors is an integer number (24669113).

Almost surely, 2^84579812 is an apocalyptic number.

It is an amenable number.

84579812 is a deficient number, since it is larger than the sum of its proper divisors (63434866).

84579812 is a wasteful number, since it uses less digits than its factorization.

84579812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21144957 (or 21144955 counting only the distinct ones).

The product of its digits is 161280, while the sum is 44.

The square root of 84579812 is about 9196.7283313143. The cubic root of 84579812 is about 438.9572622159.

The spelling of 84579812 in words is "eighty-four million, five hundred seventy-nine thousand, eight hundred twelve".