90539287 has 2 divisors, whose sum is σ = 90539288. Its totient is φ = 90539286.

The previous prime is 90539279. The next prime is 90539299. The reversal of 90539287 is 78293509.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90539287 - 2³ = 90539279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90539257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45269643 + 45269644.

It is an arithmetic number, because the mean of its divisors is an integer number (45269644).

Almost surely, 2^90539287 is an apocalyptic number.

90539287 is a deficient number, since it is larger than the sum of its proper divisors (1).

90539287 is an equidigital number, since it uses as much as digits as its factorization.

90539287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 90539287 is about 9515.2134500493. The cubic root of 90539287 is about 449.0337902788.

The spelling of 90539287 in words is "ninety million, five hundred thirty-nine thousand, two hundred eighty-seven".