86161381 has 4 divisors (see below), whose sum is σ = 89907552. Its totient is φ = 82415212.

The previous prime is 86161363. The next prime is 86161393. The reversal of 86161381 is 18316168.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86161381 is a prime.

It is a super-2 number, since 2×86161381² = 14847567151654322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86161301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1873051 + ... + 1873096.

It is an arithmetic number, because the mean of its divisors is an integer number (22476888).

Almost surely, 2^86161381 is an apocalyptic number.

It is an amenable number.

86161381 is a deficient number, since it is larger than the sum of its proper divisors (3746171).

86161381 is a wasteful number, since it uses less digits than its factorization.

86161381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746170.

The product of its digits is 6912, while the sum is 34.

The square root of 86161381 is about 9282.3154977624. The cubic root of 86161381 is about 441.6764231538.

The spelling of 86161381 in words is "eighty-six million, one hundred sixty-one thousand, three hundred eighty-one".