1499473979 has 4 divisors (see below), whose sum is σ = 1502100600. Its totient is φ = 1496847360.

The previous prime is 1499473961. The next prime is 1499473991. The reversal of 1499473979 is 9793749941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9793749941 = 40879 ⋅239579.

It is a cyclic number.

It is not a de Polignac number, because 1499473979 - 2²⁰ = 1498425403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1499473919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312454 + ... + 1313595.

It is an arithmetic number, because the mean of its divisors is an integer number (375525150).

Almost surely, 2^1499473979 is an apocalyptic number.

1499473979 is a deficient number, since it is larger than the sum of its proper divisors (2626621).

1499473979 is an equidigital number, since it uses as much as digits as its factorization.

1499473979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626620.

The product of its digits is 15431472, while the sum is 62.

The square root of 1499473979 is about 38723.0419647011. The cubic root of 1499473979 is about 1144.5804171909.

The spelling of 1499473979 in words is "one billion, four hundred ninety-nine million, four hundred seventy-three thousand, nine hundred seventy-nine".