85890923 has 2 divisors, whose sum is σ = 85890924. Its totient is φ = 85890922.

The previous prime is 85890913. The next prime is 85890929. The reversal of 85890923 is 32909858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85890923 - 2⁴ = 85890907 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (85890929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42945461 + 42945462.

It is an arithmetic number, because the mean of its divisors is an integer number (42945462).

Almost surely, 2^85890923 is an apocalyptic number.

85890923 is a deficient number, since it is larger than the sum of its proper divisors (1).

85890923 is an equidigital number, since it uses as much as digits as its factorization.

85890923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 85890923 is about 9267.7355918261. The cubic root of 85890923 is about 441.2138024005.

The spelling of 85890923 in words is "eighty-five million, eight hundred ninety thousand, nine hundred twenty-three".