90493432849 has 4 divisors (see below), whose sum is σ = 91144464880. Its totient is φ = 89842400820.

The previous prime is 90493432837. The next prime is 90493432879. The reversal of 90493432849 is 94823439409.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90493432849 - 2³⁵ = 56133694481 is a prime.

It is a super-2 number, since 2×90493432849² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90493432849.

It is not an unprimeable number, because it can be changed into a prime (90493432879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325515807 + ... + 325516084.

It is an arithmetic number, because the mean of its divisors is an integer number (22786116220).

Almost surely, 2^90493432849 is an apocalyptic number.

It is an amenable number.

90493432849 is a deficient number, since it is larger than the sum of its proper divisors (651032031).

90493432849 is a wasteful number, since it uses less digits than its factorization.

90493432849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651032030.

The product of its (nonzero) digits is 6718464, while the sum is 55.

The spelling of 90493432849 in words is "ninety billion, four hundred ninety-three million, four hundred thirty-two thousand, eight hundred forty-nine".