84872739 has 16 divisors (see below), whose sum is σ = 131523840. Its totient is φ = 47676000.

The previous prime is 84872717. The next prime is 84872759. The reversal of 84872739 is 93727848.

It is a de Polignac number, because none of the positive numbers 2^k-84872739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84872759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33012 + ... + 35489.

It is an arithmetic number, because the mean of its divisors is an integer number (8220240).

Almost surely, 2^84872739 is an apocalyptic number.

84872739 is a deficient number, since it is larger than the sum of its proper divisors (46651101).

84872739 is a wasteful number, since it uses less digits than its factorization.

84872739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68570.

The product of its digits is 677376, while the sum is 48.

The square root of 84872739 is about 9212.6401753243. The cubic root of 84872739 is about 439.4634282270.

The spelling of 84872739 in words is "eighty-four million, eight hundred seventy-two thousand, seven hundred thirty-nine".