991470423 has 8 divisors (see below), whose sum is σ = 1323148528. Its totient is φ = 660386304.

The previous prime is 991470419. The next prime is 991470437. The reversal of 991470423 is 324074199.

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

It is not a de Polignac number, because 991470423 - 2² = 991470419 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 (991477423) 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, 144586 + ... + 151287.

It is an arithmetic number, because the mean of its divisors is an integer number (165393566).

Almost surely, 2^991470423 is an apocalyptic number.

991470423 is a deficient number, since it is larger than the sum of its proper divisors (331678105).

991470423 is a wasteful number, since it uses less digits than its factorization.

991470423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296993.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 991470423 is about 31487.6233304452. The cubic root of 991470423 is about 997.1486853988.

The spelling of 991470423 in words is "nine hundred ninety-one million, four hundred seventy thousand, four hundred twenty-three".