90890453 has 2 divisors, whose sum is σ = 90890454. Its totient is φ = 90890452.

The previous prime is 90890407. The next prime is 90890467. The reversal of 90890453 is 35409809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60497284 + 30393169 = 7778^2 + 5513^2 .

It is a cyclic number.

It is not a de Polignac number, because 90890453 - 2⁸ = 90890197 is a prime.

It is a super-2 number, since 2×90890453² = 16522148893090418, which contains 22 as substring.

It is equal to p_5265668 and since 90890453 and 5265668 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90890473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45445226 + 45445227.

It is an arithmetic number, because the mean of its divisors is an integer number (45445227).

Almost surely, 2^90890453 is an apocalyptic number.

It is an amenable number.

90890453 is a deficient number, since it is larger than the sum of its proper divisors (1).

90890453 is an equidigital number, since it uses as much as digits as its factorization.

90890453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 90890453 is about 9533.6484621576. The cubic root of 90890453 is about 449.6135826797.

The spelling of 90890453 in words is "ninety million, eight hundred ninety thousand, four hundred fifty-three".