90668641 has 8 divisors (see below), whose sum is σ = 103680704. Its totient is φ = 77671440.

The previous prime is 90668623. The next prime is 90668689. The reversal of 90668641 is 14686609.

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

It is not a de Polignac number, because 90668641 - 2⁹ = 90668129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90668594 and 90668603.

It is not an unprimeable number, because it can be changed into a prime (90668341) 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, 17311 + ... + 21931.

It is an arithmetic number, because the mean of its divisors is an integer number (12960088).

Almost surely, 2^90668641 is an apocalyptic number.

It is an amenable number.

90668641 is a deficient number, since it is larger than the sum of its proper divisors (13012063).

90668641 is a wasteful number, since it uses less digits than its factorization.

90668641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7431.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 90668641 is about 9522.0082440628. The cubic root of 90668641 is about 449.2475342381.

The spelling of 90668641 in words is "ninety million, six hundred sixty-eight thousand, six hundred forty-one".