1979659925 has 12 divisors (see below), whose sum is σ = 2458776036. Its totient is φ = 1581148800.

The previous prime is 1979659919. The next prime is 1979659931. The reversal of 1979659925 is 5299569791.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1979659919) and next prime (1979659931).

It can be written as a sum of positive squares in 6 ways, for example, as 86452804 + 1893207121 = 9298^2 + 43511^2 .

It is not a de Polignac number, because 1979659925 - 2⁶ = 1979659861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48746 + ... + 79595.

It is an arithmetic number, because the mean of its divisors is an integer number (204898003).

Almost surely, 2^1979659925 is an apocalyptic number.

It is an amenable number.

1979659925 is a deficient number, since it is larger than the sum of its proper divisors (479116111).

1979659925 is a wasteful number, since it uses less digits than its factorization.

1979659925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128968 (or 128963 counting only the distinct ones).

The product of its digits is 13778100, while the sum is 62.

The square root of 1979659925 is about 44493.3694498405. The cubic root of 1979659925 is about 1255.6353401744.

The spelling of 1979659925 in words is "one billion, nine hundred seventy-nine million, six hundred fifty-nine thousand, nine hundred twenty-five".