1979920570 has 8 divisors (see below), whose sum is σ = 3563857044. Its totient is φ = 791968224.

The previous prime is 1979920549. The next prime is 1979920571. The reversal of 1979920570 is 750299791.

It can be written as a sum of positive squares in 2 ways, for example, as 1819619649 + 160300921 = 42657^2 + 12661^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1979920571) 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, 98996019 + ... + 98996038.

Almost surely, 2^1979920570 is an apocalyptic number.

1979920570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1979920570 is a deficient number, since it is larger than the sum of its proper divisors (1583936474).

1979920570 is a wasteful number, since it uses less digits than its factorization.

1979920570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197992064.

The product of its (nonzero) digits is 357210, while the sum is 49.

The square root of 1979920570 is about 44496.2983853713. The cubic root of 1979920570 is about 1255.6904440345.

The spelling of 1979920570 in words is "one billion, nine hundred seventy-nine million, nine hundred twenty thousand, five hundred seventy".