90968861 has 4 divisors (see below), whose sum is σ = 91021500. Its totient is φ = 90916224.

The previous prime is 90968837. The next prime is 90968863. The reversal of 90968861 is 16886909.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75516100 + 15452761 = 8690^2 + 3931^2 .

It is a cyclic number.

It is not a de Polignac number, because 90968861 - 2¹⁸ = 90706717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90968863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23636 + ... + 27213.

It is an arithmetic number, because the mean of its divisors is an integer number (22755375).

Almost surely, 2^90968861 is an apocalyptic number.

It is an amenable number.

90968861 is a deficient number, since it is larger than the sum of its proper divisors (52639).

90968861 is a wasteful number, since it uses less digits than its factorization.

90968861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52638.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 90968861 is about 9537.7597474459. The cubic root of 90968861 is about 449.7428341329.

The spelling of 90968861 in words is "ninety million, nine hundred sixty-eight thousand, eight hundred sixty-one".