90835139 has 2 divisors, whose sum is σ = 90835140. Its totient is φ = 90835138.

The previous prime is 90835127. The next prime is 90835153. The reversal of 90835139 is 93153809.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90835139 - 2⁸ = 90834883 is a prime.

It is not a weakly prime, because it can be changed into another prime (90835169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45417569 + 45417570.

It is an arithmetic number, because the mean of its divisors is an integer number (45417570).

Almost surely, 2^90835139 is an apocalyptic number.

90835139 is a deficient number, since it is larger than the sum of its proper divisors (1).

90835139 is an equidigital number, since it uses as much as digits as its factorization.

90835139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 90835139 is about 9530.7470326308. The cubic root of 90835139 is about 449.5223557441.

The spelling of 90835139 in words is "ninety million, eight hundred thirty-five thousand, one hundred thirty-nine".