90868655 has 8 divisors (see below), whose sum is σ = 115456752. Its totient is φ = 68418688.

The previous prime is 90868651. The next prime is 90868663. The reversal of 90868655 is 55686809.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 90868655 - 2² = 90868651 is a prime.

It is a super-2 number, since 2×90868655² = 16514224923018050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90868651) 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, 534437 + ... + 534606.

It is an arithmetic number, because the mean of its divisors is an integer number (14432094).

Almost surely, 2^90868655 is an apocalyptic number.

90868655 is a deficient number, since it is larger than the sum of its proper divisors (24588097).

90868655 is a wasteful number, since it uses less digits than its factorization.

90868655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069065.

The product of its (nonzero) digits is 518400, while the sum is 47.

The square root of 90868655 is about 9532.5051796472. The cubic root of 90868655 is about 449.5776366218.

The spelling of 90868655 in words is "ninety million, eight hundred sixty-eight thousand, six hundred fifty-five".