90270923 has 2 divisors, whose sum is σ = 90270924. Its totient is φ = 90270922.

The previous prime is 90270907. The next prime is 90270931. The reversal of 90270923 is 32907209.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90270923 - 2⁴ = 90270907 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90270923.

It is not a weakly prime, because it can be changed into another prime (90270223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45135461 + 45135462.

It is an arithmetic number, because the mean of its divisors is an integer number (45135462).

Almost surely, 2^90270923 is an apocalyptic number.

90270923 is a deficient number, since it is larger than the sum of its proper divisors (1).

90270923 is an equidigital number, since it uses as much as digits as its factorization.

90270923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 90270923 is about 9501.1011467093. The cubic root of 90270923 is about 448.5896966503.

The spelling of 90270923 in words is "ninety million, two hundred seventy thousand, nine hundred twenty-three".