86198131 has 4 divisors (see below), whose sum is σ = 86856264. Its totient is φ = 85540000.

The previous prime is 86198129. The next prime is 86198137. The reversal of 86198131 is 13189168.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86198131 - 2¹ = 86198129 is a prime.

It is a super-2 number, since 2×86198131² = 14860235575786322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86198137) 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, 328870 + ... + 329131.

It is an arithmetic number, because the mean of its divisors is an integer number (21714066).

Almost surely, 2^86198131 is an apocalyptic number.

86198131 is a deficient number, since it is larger than the sum of its proper divisors (658133).

86198131 is a wasteful number, since it uses less digits than its factorization.

86198131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658132.

The product of its digits is 10368, while the sum is 37.

The square root of 86198131 is about 9284.2948574461. The cubic root of 86198131 is about 441.7392096024.

The spelling of 86198131 in words is "eighty-six million, one hundred ninety-eight thousand, one hundred thirty-one".