90945969 has 8 divisors (see below), whose sum is σ = 121367712. Its totient is φ = 60577440.

The previous prime is 90945947. The next prime is 90945973. The reversal of 90945969 is 96954909.

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

It is not a de Polignac number, because 90945969 - 2⁸ = 90945713 is a prime.

It is a super-2 number, since 2×90945969² = 16542338554697922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90945469) 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, 9127 + ... + 16284.

It is an arithmetic number, because the mean of its divisors is an integer number (15170964).

Almost surely, 2^90945969 is an apocalyptic number.

It is an amenable number.

90945969 is a deficient number, since it is larger than the sum of its proper divisors (30421743).

90945969 is a wasteful number, since it uses less digits than its factorization.

90945969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26607.

The product of its (nonzero) digits is 787320, while the sum is 51.

The square root of 90945969 is about 9536.5595997718. The cubic root of 90945969 is about 449.7051055571.

The spelling of 90945969 in words is "ninety million, nine hundred forty-five thousand, nine hundred sixty-nine".