84156761 has 6 divisors (see below), whose sum is σ = 91128510. Its totient is φ = 77683008.

The previous prime is 84156733. The next prime is 84156769. The reversal of 84156761 is 16765148.

It can be written as a sum of positive squares in 3 ways, for example, as 891136 + 83265625 = 944^2 + 9125^2 .

It is not a de Polignac number, because 84156761 - 2¹⁴ = 84140377 is a prime.

It is a super-2 number, since 2×84156761² = 14164720844022242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84156769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 248816 + ... + 249153.

It is an arithmetic number, because the mean of its divisors is an integer number (15188085).

Almost surely, 2^84156761 is an apocalyptic number.

It is an amenable number.

84156761 is a deficient number, since it is larger than the sum of its proper divisors (6971749).

84156761 is a wasteful number, since it uses less digits than its factorization.

84156761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497995 (or 497982 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 84156761 is about 9173.6994173561. The cubic root of 84156761 is about 438.2241803258.

The spelling of 84156761 in words is "eighty-four million, one hundred fifty-six thousand, seven hundred sixty-one".