1979513947 has 8 divisors (see below), whose sum is σ = 1989630720. Its totient is φ = 1969417320.

The previous prime is 1979513911. The next prime is 1979513953. The reversal of 1979513947 is 7493159791.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1979513947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979513647) 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, 216172 + ... + 225142.

It is an arithmetic number, because the mean of its divisors is an integer number (248703840).

Almost surely, 2^1979513947 is an apocalyptic number.

1979513947 is a deficient number, since it is larger than the sum of its proper divisors (10116773).

1979513947 is an equidigital number, since it uses as much as digits as its factorization.

1979513947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10073.

The product of its digits is 2143260, while the sum is 55.

The square root of 1979513947 is about 44491.7289729226. The cubic root of 1979513947 is about 1255.6044763479.

The spelling of 1979513947 in words is "one billion, nine hundred seventy-nine million, five hundred thirteen thousand, nine hundred forty-seven".