990794294533 has 4 divisors (see below), whose sum is σ = 990796593280. Its totient is φ = 990791995788.

The previous prime is 990794294509. The next prime is 990794294557. The reversal of 990794294533 is 335492497099.

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 an interprime number because it is at equal distance from previous prime (990794294509) and next prime (990794294557).

It is a 3-Lehmer number, since φ(990794294533) divides (990794294533-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990794294533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990797294533) 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, 287343 + ... + 1436716.

It is an arithmetic number, because the mean of its divisors is an integer number (247699148320).

Almost surely, 2^990794294533 is an apocalyptic number.

990794294533 is the 574687-th octagonal number.

It is an amenable number.

990794294533 is a deficient number, since it is larger than the sum of its proper divisors (2298747).

990794294533 is a wasteful number, since it uses less digits than its factorization.

990794294533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298746.

The product of its (nonzero) digits is 66134880, while the sum is 64.

The spelling of 990794294533 in words is "nine hundred ninety billion, seven hundred ninety-four million, two hundred ninety-four thousand, five hundred thirty-three".