1979671225 has 24 divisors (see below), whose sum is σ = 2902224960. Its totient is φ = 1310675520.

The previous prime is 1979671207. The next prime is 1979671229. The reversal of 1979671225 is 5221769791.

It is a happy number.

It is not a de Polignac number, because 1979671225 - 2⁵ = 1979671193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1979671229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189967 + ... + 200116.

It is an arithmetic number, because the mean of its divisors is an integer number (120926040).

Almost surely, 2^1979671225 is an apocalyptic number.

It is an amenable number.

1979671225 is a deficient number, since it is larger than the sum of its proper divisors (922553735).

1979671225 is a wasteful number, since it uses less digits than its factorization.

1979671225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390129 (or 390124 counting only the distinct ones).

The product of its digits is 476280, while the sum is 49.

The square root of 1979671225 is about 44493.4964348724. The cubic root of 1979671225 is about 1255.6377292467.

The spelling of 1979671225 in words is "one billion, nine hundred seventy-nine million, six hundred seventy-one thousand, two hundred twenty-five".