90839807 has 2 divisors, whose sum is σ = 90839808. Its totient is φ = 90839806.

The previous prime is 90839783. The next prime is 90839839. The reversal of 90839807 is 70893809.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90839807 - 2¹⁴ = 90823423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90839867) 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, 45419903 + 45419904.

It is an arithmetic number, because the mean of its divisors is an integer number (45419904).

Almost surely, 2^90839807 is an apocalyptic number.

90839807 is a deficient number, since it is larger than the sum of its proper divisors (1).

90839807 is an equidigital number, since it uses as much as digits as its factorization.

90839807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 90839807 is about 9530.9919210961. The cubic root of 90839807 is about 449.5300559008.

The spelling of 90839807 in words is "ninety million, eight hundred thirty-nine thousand, eight hundred seven".