991302893 has 8 divisors (see below), whose sum is σ = 1134718080. Its totient is φ = 848337840.

The previous prime is 991302883. The next prime is 991302899. The reversal of 991302893 is 398203199.

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

It is not a de Polignac number, because 991302893 - 2¹⁰ = 991301869 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 (991302899) 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, 107798 + ... + 116631.

It is an arithmetic number, because the mean of its divisors is an integer number (141839760).

Almost surely, 2^991302893 is an apocalyptic number.

It is an amenable number.

991302893 is a deficient number, since it is larger than the sum of its proper divisors (143415187).

991302893 is a wasteful number, since it uses less digits than its factorization.

991302893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225067.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 991302893 is about 31484.9629664702. The cubic root of 991302893 is about 997.0925190808.

The spelling of 991302893 in words is "nine hundred ninety-one million, three hundred two thousand, eight hundred ninety-three".