90923647 has 2 divisors, whose sum is σ = 90923648. Its totient is φ = 90923646.

The previous prime is 90923641. The next prime is 90923681. The reversal of 90923647 is 74632909.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90923647 - 2³ = 90923639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90923641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45461823 + 45461824.

It is an arithmetic number, because the mean of its divisors is an integer number (45461824).

Almost surely, 2^90923647 is an apocalyptic number.

90923647 is a deficient number, since it is larger than the sum of its proper divisors (1).

90923647 is an equidigital number, since it uses as much as digits as its factorization.

90923647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 90923647 is about 9535.3891897499. The cubic root of 90923647 is about 449.6683103080.

The spelling of 90923647 in words is "ninety million, nine hundred twenty-three thousand, six hundred forty-seven".