90009547 has 2 divisors, whose sum is σ = 90009548. Its totient is φ = 90009546.

The previous prime is 90009539. The next prime is 90009553. The reversal of 90009547 is 74590009.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90009547 - 2³ = 90009539 is a prime.

It is a super-2 number, since 2×90009547² = 16203437102290418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90009247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45004773 + 45004774.

It is an arithmetic number, because the mean of its divisors is an integer number (45004774).

Almost surely, 2^90009547 is an apocalyptic number.

90009547 is a deficient number, since it is larger than the sum of its proper divisors (1).

90009547 is an equidigital number, since it uses as much as digits as its factorization.

90009547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 90009547 is about 9487.3361382424. The cubic root of 90009547 is about 448.1563200107.

The spelling of 90009547 in words is "ninety million, nine thousand, five hundred forty-seven".