90379439 has 2 divisors, whose sum is σ = 90379440. Its totient is φ = 90379438.

The previous prime is 90379403. The next prime is 90379441. The reversal of 90379439 is 93497309.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90379439 - 2²⁰ = 89330863 is a prime.

Together with 90379441, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90379439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90379039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45189719 + 45189720.

It is an arithmetic number, because the mean of its divisors is an integer number (45189720).

Almost surely, 2^90379439 is an apocalyptic number.

90379439 is a deficient number, since it is larger than the sum of its proper divisors (1).

90379439 is an equidigital number, since it uses as much as digits as its factorization.

90379439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 90379439 is about 9506.8101380011. The cubic root of 90379439 is about 448.7693767545.

The spelling of 90379439 in words is "ninety million, three hundred seventy-nine thousand, four hundred thirty-nine".