90209769239 has 2 divisors, whose sum is σ = 90209769240. Its totient is φ = 90209769238.

The previous prime is 90209769211. The next prime is 90209769277. The reversal of 90209769239 is 93296790209.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90209769239 - 2³⁶ = 21490292503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90209768239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45104884619 + 45104884620.

It is an arithmetic number, because the mean of its divisors is an integer number (45104884620).

Almost surely, 2^90209769239 is an apocalyptic number.

90209769239 is a deficient number, since it is larger than the sum of its proper divisors (1).

90209769239 is an equidigital number, since it uses as much as digits as its factorization.

90209769239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3306744, while the sum is 56.

The spelling of 90209769239 in words is "ninety billion, two hundred nine million, seven hundred sixty-nine thousand, two hundred thirty-nine".