1979320913 has 8 divisors (see below), whose sum is σ = 2066840448. Its totient is φ = 1891923264.

The previous prime is 1979320873. The next prime is 1979320921. The reversal of 1979320913 is 3190239791.

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-1979320913 is a prime.

It is a super-2 number, since 2×1979320913² = 7835422553278307138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979320943) 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, 3545 + ... + 63017.

It is an arithmetic number, because the mean of its divisors is an integer number (258355056).

Almost surely, 2^1979320913 is an apocalyptic number.

It is an amenable number.

1979320913 is a deficient number, since it is larger than the sum of its proper divisors (87519535).

1979320913 is a wasteful number, since it uses less digits than its factorization.

1979320913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60943.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 1979320913 is about 44489.5595954826. The cubic root of 1979320913 is about 1255.5636612388.

The spelling of 1979320913 in words is "one billion, nine hundred seventy-nine million, three hundred twenty thousand, nine hundred thirteen".