90945970 has 32 divisors (see below), whose sum is σ = 173721600. Its totient is φ = 34183296.

The previous prime is 90945947. The next prime is 90945973. The reversal of 90945970 is 7954909.

It is not an unprimeable number, because it can be changed into a prime (90945973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22246 + ... + 26014.

It is an arithmetic number, because the mean of its divisors is an integer number (5428800).

Almost surely, 2^90945970 is an apocalyptic number.

90945970 is a deficient number, since it is larger than the sum of its proper divisors (82775630).

90945970 is a wasteful number, since it uses less digits than its factorization.

90945970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 90945970 is about 9536.5596522016. The cubic root of 90945970 is about 449.7051072054.

The spelling of 90945970 in words is "ninety million, nine hundred forty-five thousand, nine hundred seventy".