991176479 has 8 divisors (see below), whose sum is σ = 1010726640. Its totient is φ = 971657856.

The previous prime is 991176469. The next prime is 991176491. The reversal of 991176479 is 974671199.

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

It is a cyclic number.

It is not a de Polignac number, because 991176479 - 2²⁰ = 990127903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 991176479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991176419) 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, 61532 + ... + 75950.

It is an arithmetic number, because the mean of its divisors is an integer number (126340830).

Almost surely, 2^991176479 is an apocalyptic number.

991176479 is a deficient number, since it is larger than the sum of its proper divisors (19550161).

991176479 is a wasteful number, since it uses less digits than its factorization.

991176479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15769.

The product of its digits is 857304, while the sum is 53.

The square root of 991176479 is about 31482.9553727092. The cubic root of 991176479 is about 997.0501331753.

The spelling of 991176479 in words is "nine hundred ninety-one million, one hundred seventy-six thousand, four hundred seventy-nine".