90618961 has 8 divisors (see below), whose sum is σ = 97418880. Its totient is φ = 84022128.

The previous prime is 90618953. The next prime is 90618967. The reversal of 90618961 is 16981609.

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 90618961 - 2³ = 90618953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90618967) 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, 49846 + ... + 51631.

It is an arithmetic number, because the mean of its divisors is an integer number (12177360).

Almost surely, 2^90618961 is an apocalyptic number.

It is an amenable number.

90618961 is a deficient number, since it is larger than the sum of its proper divisors (6799919).

90618961 is a wasteful number, since it uses less digits than its factorization.

90618961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101543.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 90618961 is about 9519.3991932264. The cubic root of 90618961 is about 449.1654672933.

The spelling of 90618961 in words is "ninety million, six hundred eighteen thousand, nine hundred sixty-one".