90923641 has 2 divisors, whose sum is σ = 90923642. Its totient is φ = 90923640.

The previous prime is 90923639. The next prime is 90923647. The reversal of 90923641 is 14632909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84272400 + 6651241 = 9180^2 + 2579^2 .

It is a cyclic number.

It is not a de Polignac number, because 90923641 - 2¹ = 90923639 is a prime.

Together with 90923639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 90923597 and 90923606.

It is not a weakly prime, because it can be changed into another prime (90923647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45461820 + 45461821.

It is an arithmetic number, because the mean of its divisors is an integer number (45461821).

Almost surely, 2^90923641 is an apocalyptic number.

It is an amenable number.

90923641 is a deficient number, since it is larger than the sum of its proper divisors (1).

90923641 is an equidigital number, since it uses as much as digits as its factorization.

90923641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 90923641 is about 9535.3888751325. The cubic root of 90923641 is about 449.6683004169.

The spelling of 90923641 in words is "ninety million, nine hundred twenty-three thousand, six hundred forty-one".