86154981 has 32 divisors (see below), whose sum is σ = 131918976. Its totient is φ = 49536000.

The previous prime is 86154979. The next prime is 86154989. The reversal of 86154981 is 18945168.

It is not a de Polignac number, because 86154981 - 2¹ = 86154979 is a prime.

It is a super-2 number, since 2×86154981² = 14845361502220722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86154989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49201 + ... + 50921.

It is an arithmetic number, because the mean of its divisors is an integer number (4122468).

Almost surely, 2^86154981 is an apocalyptic number.

It is an amenable number.

86154981 is a deficient number, since it is larger than the sum of its proper divisors (45763995).

86154981 is a wasteful number, since it uses less digits than its factorization.

86154981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813.

The product of its digits is 69120, while the sum is 42.

The square root of 86154981 is about 9281.9707497923. The cubic root of 86154981 is about 441.6654870899.

The spelling of 86154981 in words is "eighty-six million, one hundred fifty-four thousand, nine hundred eighty-one".