90368881 has 4 divisors (see below), whose sum is σ = 90428992. Its totient is φ = 90308772.

The previous prime is 90368857. The next prime is 90368891. The reversal of 90368881 is 18886309.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90368881 is a prime.

It is a super-2 number, since 2×90368881² = 16333069306384322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90368851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27741 + ... + 30826.

It is an arithmetic number, because the mean of its divisors is an integer number (22607248).

Almost surely, 2^90368881 is an apocalyptic number.

It is an amenable number.

90368881 is a deficient number, since it is larger than the sum of its proper divisors (60111).

90368881 is a wasteful number, since it uses less digits than its factorization.

90368881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60110.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 90368881 is about 9506.2548356332. The cubic root of 90368881 is about 448.7519012031.

The spelling of 90368881 in words is "ninety million, three hundred sixty-eight thousand, eight hundred eighty-one".