991641354 has 16 divisors (see below), whose sum is σ = 2163581280. Its totient is φ = 300497360.

The previous prime is 991641349. The next prime is 991641367. The reversal of 991641354 is 453146199.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7512369 + ... + 7512500.

It is an arithmetic number, because the mean of its divisors is an integer number (135223830).

Almost surely, 2^991641354 is an apocalyptic number.

991641354 is an abundant number, since it is smaller than the sum of its proper divisors (1171939926).

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

991641354 is a wasteful number, since it uses less digits than its factorization.

991641354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15024885.

The product of its digits is 116640, while the sum is 42.

The square root of 991641354 is about 31490.3374704051. The cubic root of 991641354 is about 997.2059854197.

The spelling of 991641354 in words is "nine hundred ninety-one million, six hundred forty-one thousand, three hundred fifty-four".