90531973933849 has 4 divisors (see below), whose sum is σ = 103465113067264. Its totient is φ = 77598834800436.

The previous prime is 90531973933811. The next prime is 90531973933867. The reversal of 90531973933849 is 94833937913509.

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 90531973933849 - 2²⁵ = 90531940379417 is a prime.

It is a super-2 number, since 2×90531973933849² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90531973933879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6466569566697 + ... + 6466569566710.

It is an arithmetic number, because the mean of its divisors is an integer number (25866278266816).

Almost surely, 2^{90531973933849} is an apocalyptic number.

It is an amenable number.

90531973933849 is a deficient number, since it is larger than the sum of its proper divisors (12933139133415).

90531973933849 is a wasteful number, since it uses less digits than its factorization.

90531973933849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12933139133414.

The product of its (nonzero) digits is 595213920, while the sum is 73.

The spelling of 90531973933849 in words is "ninety trillion, five hundred thirty-one billion, nine hundred seventy-three million, nine hundred thirty-three thousand, eight hundred forty-nine".