90045547 has 2 divisors, whose sum is σ = 90045548. Its totient is φ = 90045546.

The previous prime is 90045533. The next prime is 90045559. The reversal of 90045547 is 74554009.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90045547 - 2⁷ = 90045419 is a prime.

It is not a weakly prime, because it can be changed into another prime (90045517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45022773 + 45022774.

It is an arithmetic number, because the mean of its divisors is an integer number (45022774).

Almost surely, 2^90045547 is an apocalyptic number.

90045547 is a deficient number, since it is larger than the sum of its proper divisors (1).

90045547 is an equidigital number, since it uses as much as digits as its factorization.

90045547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 90045547 is about 9489.2332145437. The cubic root of 90045547 is about 448.2160598850.

The spelling of 90045547 in words is "ninety million, forty-five thousand, five hundred forty-seven".