84307979 has 12 divisors (see below), whose sum is σ = 98301744. Its totient is φ = 72095184.

The previous prime is 84307969. The next prime is 84307987. The reversal of 84307979 is 97970348.

It is not a de Polignac number, because 84307979 - 2¹⁶ = 84242443 is a prime.

It is a super-4 number, since 4×84307979⁴ (a number of 33 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84307939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22097 + ... + 25629.

It is an arithmetic number, because the mean of its divisors is an integer number (8191812).

Almost surely, 2^84307979 is an apocalyptic number.

84307979 is a deficient number, since it is larger than the sum of its proper divisors (13993765).

84307979 is a wasteful number, since it uses less digits than its factorization.

84307979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034 (or 4027 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 84307979 is about 9181.9376495378. The cubic root of 84307979 is about 438.4864992482.

The spelling of 84307979 in words is "eighty-four million, three hundred seven thousand, nine hundred seventy-nine".