86997690 has 48 divisors (see below), whose sum is σ = 243596808. Its totient is φ = 21414528.

The previous prime is 86997689. The next prime is 86997697. The reversal of 86997690 is 9679968.

It can be written as a sum of positive squares in 4 ways, for example, as 30702681 + 56295009 = 5541^2 + 7503^2 .

It is a super-2 number, since 2×86997690² = 15137196130672200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86997697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36009 + ... + 38348.

Almost surely, 2^86997690 is an apocalyptic number.

86997690 is an abundant number, since it is smaller than the sum of its proper divisors (156599118).

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

86997690 is a wasteful number, since it uses less digits than its factorization.

86997690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74383 (or 74380 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 86997690 is about 9327.2552232691. The cubic root of 86997690 is about 443.1008404029.

The spelling of 86997690 in words is "eighty-six million, nine hundred ninety-seven thousand, six hundred ninety".