90053569 has 2 divisors, whose sum is σ = 90053570. Its totient is φ = 90053568.

The previous prime is 90053501. The next prime is 90053591. The reversal of 90053569 is 96535009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88642225 + 1411344 = 9415^2 + 1188^2 .

It is an emirp because it is prime and its reverse (96535009) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90053569 is a prime.

It is a super-2 number, since 2×90053569² = 16219290579275522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90053069) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45026784 + 45026785.

It is an arithmetic number, because the mean of its divisors is an integer number (45026785).

Almost surely, 2^90053569 is an apocalyptic number.

It is an amenable number.

90053569 is a deficient number, since it is larger than the sum of its proper divisors (1).

90053569 is an equidigital number, since it uses as much as digits as its factorization.

90053569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 90053569 is about 9489.6558947098. The cubic root of 90053569 is about 448.2293697509.

The spelling of 90053569 in words is "ninety million, fifty-three thousand, five hundred sixty-nine".