90045469 has 2 divisors, whose sum is σ = 90045470. Its totient is φ = 90045468.

The previous prime is 90045443. The next prime is 90045479. The reversal of 90045469 is 96454009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77528025 + 12517444 = 8805^2 + 3538^2 .

It is a cyclic number.

It is not a de Polignac number, because 90045469 - 2⁷ = 90045341 is a prime.

It is a super-2 number, since 2×90045469² = 16216372974859922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90045419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45022734 + 45022735.

It is an arithmetic number, because the mean of its divisors is an integer number (45022735).

Almost surely, 2^90045469 is an apocalyptic number.

It is an amenable number.

90045469 is a deficient number, since it is larger than the sum of its proper divisors (1).

90045469 is an equidigital number, since it uses as much as digits as its factorization.

90045469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 90045469 is about 9489.2291046217. The cubic root of 90045469 is about 448.2159304658.

The spelling of 90045469 in words is "ninety million, forty-five thousand, four hundred sixty-nine".