991349415 has 64 divisors (see below), whose sum is σ = 2120217600. Its totient is φ = 429328512.

The previous prime is 991349389. The next prime is 991349431. The reversal of 991349415 is 514943199.

It is not a de Polignac number, because 991349415 - 2⁷ = 991349287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent 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 63 ways as a sum of consecutive naturals, for example, 9652 + ... + 45561.

It is an arithmetic number, because the mean of its divisors is an integer number (33128400).

Almost surely, 2^991349415 is an apocalyptic number.

991349415 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

991349415 is an abundant number, since it is smaller than the sum of its proper divisors (1128868185).

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

991349415 is a wasteful number, since it uses less digits than its factorization.

991349415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55253 (or 55247 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 991349415 is about 31485.7017549236. The cubic root of 991349415 is about 997.1081167395.

The spelling of 991349415 in words is "nine hundred ninety-one million, three hundred forty-nine thousand, four hundred fifteen".