1479934991 has 4 divisors (see below), whose sum is σ = 1519933272. Its totient is φ = 1439936712.

The previous prime is 1479934961. The next prime is 1479935021. The reversal of 1479934991 is 1994399741.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1479934961) and next prime (1479935021).

It is a cyclic number.

It is not a de Polignac number, because 1479934991 - 2²⁶ = 1412826127 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 (1479934961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19999085 + ... + 19999158.

It is an arithmetic number, because the mean of its divisors is an integer number (379983318).

Almost surely, 2^1479934991 is an apocalyptic number.

1479934991 is a deficient number, since it is larger than the sum of its proper divisors (39998281).

1479934991 is an equidigital number, since it uses as much as digits as its factorization.

1479934991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39998280.

The product of its digits is 2204496, while the sum is 56.

The square root of 1479934991 is about 38469.9231998194. The cubic root of 1479934991 is about 1139.5871571171.

The spelling of 1479934991 in words is "one billion, four hundred seventy-nine million, nine hundred thirty-four thousand, nine hundred ninety-one".