90737239 has 2 divisors, whose sum is σ = 90737240. Its totient is φ = 90737238.

The previous prime is 90737237. The next prime is 90737243. The reversal of 90737239 is 93273709.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90737239 - 2¹ = 90737237 is a prime.

Together with 90737237, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90737237) 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, 45368619 + 45368620.

It is an arithmetic number, because the mean of its divisors is an integer number (45368620).

Almost surely, 2^90737239 is an apocalyptic number.

90737239 is a deficient number, since it is larger than the sum of its proper divisors (1).

90737239 is an equidigital number, since it uses as much as digits as its factorization.

90737239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 90737239 is about 9525.6096392829. The cubic root of 90737239 is about 449.3608027778.

The spelling of 90737239 in words is "ninety million, seven hundred thirty-seven thousand, two hundred thirty-nine".