991352798 has 8 divisors (see below), whose sum is σ = 1489152600. Its totient is φ = 494968600.

The previous prime is 991352783. The next prime is 991352819. The reversal of 991352798 is 897253199.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352148 + ... + 354951.

It is an arithmetic number, because the mean of its divisors is an integer number (186144075).

Almost surely, 2^991352798 is an apocalyptic number.

991352798 is a deficient number, since it is larger than the sum of its proper divisors (497799802).

991352798 is a wasteful number, since it uses less digits than its factorization.

991352798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707802.

The product of its digits is 1224720, while the sum is 53.

The square root of 991352798 is about 31485.7554776759. The cubic root of 991352798 is about 997.1092509554.

The spelling of 991352798 in words is "nine hundred ninety-one million, three hundred fifty-two thousand, seven hundred ninety-eight".