90032869 has 2 divisors, whose sum is σ = 90032870. Its totient is φ = 90032868.

The previous prime is 90032861. The next prime is 90032893. The reversal of 90032869 is 96823009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84916225 + 5116644 = 9215^2 + 2262^2 .

It is an emirp because it is prime and its reverse (96823009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90032869 - 2³ = 90032861 is a prime.

It is a super-2 number, since 2×90032869² = 16211835000742322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90032861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45016434 + 45016435.

It is an arithmetic number, because the mean of its divisors is an integer number (45016435).

Almost surely, 2^90032869 is an apocalyptic number.

It is an amenable number.

90032869 is a deficient number, since it is larger than the sum of its proper divisors (1).

90032869 is an equidigital number, since it uses as much as digits as its factorization.

90032869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 90032869 is about 9488.5651707727. The cubic root of 90032869 is about 448.1950233092.

The spelling of 90032869 in words is "ninety million, thirty-two thousand, eight hundred sixty-nine".