1979347859 has 4 divisors (see below), whose sum is σ = 2095780104. Its totient is φ = 1862915616.

The previous prime is 1979347849. The next prime is 1979347873. The reversal of 1979347859 is 9587439791.

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

It is a cyclic number.

It is not a de Polignac number, because 1979347859 - 2¹⁶ = 1979282323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979347849) 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, 58216097 + ... + 58216130.

It is an arithmetic number, because the mean of its divisors is an integer number (523945026).

Almost surely, 2^1979347859 is an apocalyptic number.

1979347859 is a deficient number, since it is larger than the sum of its proper divisors (116432245).

1979347859 is a wasteful number, since it uses less digits than its factorization.

1979347859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116432244.

The product of its digits is 17146080, while the sum is 62.

The square root of 1979347859 is about 44489.8624295468. The cubic root of 1979347859 is about 1255.5693588604.

The spelling of 1979347859 in words is "one billion, nine hundred seventy-nine million, three hundred forty-seven thousand, eight hundred fifty-nine".