84156739 has 8 divisors (see below), whose sum is σ = 85963680. Its totient is φ = 82358016.

The previous prime is 84156733. The next prime is 84156769. The reversal of 84156739 is 93765148.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84156739 - 2³ = 84156731 is a prime.

It is a super-2 number, since 2×84156739² = 14164713438228242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84156695 and 84156704.

It is not an unprimeable number, because it can be changed into a prime (84156731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21459 + ... + 25075.

It is an arithmetic number, because the mean of its divisors is an integer number (10745460).

Almost surely, 2^84156739 is an apocalyptic number.

84156739 is a deficient number, since it is larger than the sum of its proper divisors (1806941).

84156739 is a wasteful number, since it uses less digits than its factorization.

84156739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4109.

The product of its digits is 181440, while the sum is 43.

The square root of 84156739 is about 9173.6982182760. The cubic root of 84156739 is about 438.2241421394.

The spelling of 84156739 in words is "eighty-four million, one hundred fifty-six thousand, seven hundred thirty-nine".