1979975321 has 8 divisors (see below), whose sum is σ = 2029776000. Its totient is φ = 1930246560.

The previous prime is 1979975297. The next prime is 1979975359. The reversal of 1979975321 is 1235799791.

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-1979975321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979975381) 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, 40100 + ... + 74618.

It is an arithmetic number, because the mean of its divisors is an integer number (253722000).

Almost surely, 2^1979975321 is an apocalyptic number.

It is an amenable number.

1979975321 is a deficient number, since it is larger than the sum of its proper divisors (49800679).

1979975321 is a wasteful number, since it uses less digits than its factorization.

1979975321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35959.

The product of its digits is 1071630, while the sum is 53.

The square root of 1979975321 is about 44496.9136120698. The cubic root of 1979975321 is about 1255.7020185180.

The spelling of 1979975321 in words is "one billion, nine hundred seventy-nine million, nine hundred seventy-five thousand, three hundred twenty-one".