991369353 has 8 divisors (see below), whose sum is σ = 1423504768. Its totient is φ = 610073424.

The previous prime is 991369349. The next prime is 991369373. The reversal of 991369353 is 353963199.

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

It is not a de Polignac number, because 991369353 - 2² = 991369349 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (991369303) 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, 12709825 + ... + 12709902.

It is an arithmetic number, because the mean of its divisors is an integer number (177938096).

Almost surely, 2^991369353 is an apocalyptic number.

It is an amenable number.

991369353 is a deficient number, since it is larger than the sum of its proper divisors (432135415).

991369353 is a wasteful number, since it uses less digits than its factorization.

991369353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25419743.

The product of its digits is 590490, while the sum is 48.

The square root of 991369353 is about 31486.0183732399. The cubic root of 991369353 is about 997.1148013010.

The spelling of 991369353 in words is "nine hundred ninety-one million, three hundred sixty-nine thousand, three hundred fifty-three".