86890947 has 24 divisors (see below), whose sum is σ = 137147472. Its totient is φ = 48607680.

The previous prime is 86890907. The next prime is 86890949. The reversal of 86890947 is 74909868.

It is a happy number.

It is not a de Polignac number, because 86890947 - 2¹² = 86886851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86890947.

It is not an unprimeable number, because it can be changed into a prime (86890949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4488 + ... + 13925.

It is an arithmetic number, because the mean of its divisors is an integer number (5714478).

Almost surely, 2^86890947 is an apocalyptic number.

86890947 is a deficient number, since it is larger than the sum of its proper divisors (50256525).

86890947 is a wasteful number, since it uses less digits than its factorization.

86890947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18451 (or 18440 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 86890947 is about 9321.5313656073. The cubic root of 86890947 is about 442.9195433651.

The spelling of 86890947 in words is "eighty-six million, eight hundred ninety thousand, nine hundred forty-seven".