86155749 has 12 divisors (see below), whose sum is σ = 124765836. Its totient is φ = 57290112.

The previous prime is 86155739. The next prime is 86155757. The reversal of 86155749 is 94755168.

It can be written as a sum of positive squares in 2 ways, for example, as 57608100 + 28547649 = 7590^2 + 5343^2 .

It is not a de Polignac number, because 86155749 - 2⁴ = 86155733 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86155739) 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, 8484 + ... + 15629.

It is an arithmetic number, because the mean of its divisors is an integer number (10397153).

Almost surely, 2^86155749 is an apocalyptic number.

It is an amenable number.

86155749 is a deficient number, since it is larger than the sum of its proper divisors (38610087).

86155749 is a wasteful number, since it uses less digits than its factorization.

86155749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24516 (or 24513 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 86155749 is about 9282.0121202248. The cubic root of 86155749 is about 441.6667994462. Note that the first 3 decimals are identical.

The spelling of 86155749 in words is "eighty-six million, one hundred fifty-five thousand, seven hundred forty-nine".