991141374 has 16 divisors (see below), whose sum is σ = 1982664720. Its totient is φ = 330316800.

The previous prime is 991141363. The next prime is 991141379. The reversal of 991141374 is 473141199.

It is a super-2 number, since 2×991141374² = 1964722446509215752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991141379) 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, 26524 + ... + 51824.

It is an arithmetic number, because the mean of its divisors is an integer number (123916545).

Almost surely, 2^991141374 is an apocalyptic number.

991141374 is an abundant number, since it is smaller than the sum of its proper divisors (991523346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

991141374 is a wasteful number, since it uses less digits than its factorization.

991141374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31835.

The product of its digits is 27216, while the sum is 39.

The square root of 991141374 is about 31482.3978438746. The cubic root of 991141374 is about 997.0383620263.

The spelling of 991141374 in words is "nine hundred ninety-one million, one hundred forty-one thousand, three hundred seventy-four".