86931954 has 80 divisors (see below), whose sum is σ = 208855680. Its totient is φ = 26943840.

The previous prime is 86931953. The next prime is 86931961. The reversal of 86931954 is 45913968.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86931953) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 187527 + ... + 187989.

It is an arithmetic number, because the mean of its divisors is an integer number (2610696).

Almost surely, 2^86931954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86931954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104427840).

86931954 is an abundant number, since it is smaller than the sum of its proper divisors (121923726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86931954 is a wasteful number, since it uses less digits than its factorization.

86931954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 548 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 86931954 is about 9323.7306910914. The cubic root of 86931954 is about 442.9892090240.

It can be divided in two parts, 869 and 31954, that added together give a palindrome (32823).

The spelling of 86931954 in words is "eighty-six million, nine hundred thirty-one thousand, nine hundred fifty-four".