86861391 has 8 divisors (see below), whose sum is σ = 116582784. Its totient is φ = 57523800.

The previous prime is 86861353. The next prime is 86861431. The reversal of 86861391 is 19316868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86861391 - 2⁷ = 86861263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86861491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95421 + ... + 96326.

It is an arithmetic number, because the mean of its divisors is an integer number (14572848).

Almost surely, 2^86861391 is an apocalyptic number.

86861391 is a deficient number, since it is larger than the sum of its proper divisors (29721393).

86861391 is a wasteful number, since it uses less digits than its factorization.

86861391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191901.

The product of its digits is 62208, while the sum is 42.

The square root of 86861391 is about 9319.9458689415. The cubic root of 86861391 is about 442.8693179003.

The spelling of 86861391 in words is "eighty-six million, eight hundred sixty-one thousand, three hundred ninety-one".