90861663 has 16 divisors (see below), whose sum is σ = 123762816. Its totient is φ = 59273760.

The previous prime is 90861649. The next prime is 90861671. The reversal of 90861663 is 36616809.

It is a happy number.

It is not a de Polignac number, because 90861663 - 2⁶ = 90861599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90861643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109456 + ... + 110282.

It is an arithmetic number, because the mean of its divisors is an integer number (7735176).

Almost surely, 2^90861663 is an apocalyptic number.

90861663 is a deficient number, since it is larger than the sum of its proper divisors (32901153).

90861663 is a wasteful number, since it uses less digits than its factorization.

90861663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 90861663 is about 9532.1384274464. The cubic root of 90861663 is about 449.5661052253.

The spelling of 90861663 in words is "ninety million, eight hundred sixty-one thousand, six hundred sixty-three".