90455397439 has 8 divisors (see below), whose sum is σ = 99062581968. Its totient is φ = 81912207360.

The previous prime is 90455397433. The next prime is 90455397463. The reversal of 90455397439 is 93479355409.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90455397439 - 2¹³ = 90455389247 is a prime.

It is a super-4 number, since 4×90455397439⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90455397433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15995652 + ... + 16001305.

It is an arithmetic number, because the mean of its divisors is an integer number (12382822746).

Almost surely, 2^90455397439 is an apocalyptic number.

90455397439 is a deficient number, since it is larger than the sum of its proper divisors (8607184529).

90455397439 is a wasteful number, since it uses less digits than its factorization.

90455397439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31997225.

The product of its (nonzero) digits is 18370800, while the sum is 58.

The spelling of 90455397439 in words is "ninety billion, four hundred fifty-five million, three hundred ninety-seven thousand, four hundred thirty-nine".