86874181 has 2 divisors, whose sum is σ = 86874182. Its totient is φ = 86874180.

The previous prime is 86874173. The next prime is 86874211. The reversal of 86874181 is 18147868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81162081 + 5712100 = 9009^2 + 2390^2 .

It is a cyclic number.

It is not a de Polignac number, because 86874181 - 2³ = 86874173 is a prime.

It is a super-2 number, since 2×86874181² = 15094246648841522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86874101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43437090 + 43437091.

It is an arithmetic number, because the mean of its divisors is an integer number (43437091).

Almost surely, 2^86874181 is an apocalyptic number.

It is an amenable number.

86874181 is a deficient number, since it is larger than the sum of its proper divisors (1).

86874181 is an equidigital number, since it uses as much as digits as its factorization.

86874181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 43.

The square root of 86874181 is about 9320.6320064682. The cubic root of 86874181 is about 442.8910537583.

The spelling of 86874181 in words is "eighty-six million, eight hundred seventy-four thousand, one hundred eighty-one".