1979394087 has 16 divisors (see below), whose sum is σ = 2911472640. Its totient is φ = 1186152000.

The previous prime is 1979394071. The next prime is 1979394089. The reversal of 1979394087 is 7804939791.

It is not a de Polignac number, because 1979394087 - 2⁴ = 1979394071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979394089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334039 + ... + 339912.

It is an arithmetic number, because the mean of its divisors is an integer number (181967040).

Almost surely, 2^1979394087 is an apocalyptic number.

1979394087 is a deficient number, since it is larger than the sum of its proper divisors (932078553).

1979394087 is a wasteful number, since it uses less digits than its factorization.

1979394087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674054.

The product of its (nonzero) digits is 3429216, while the sum is 57.

The square root of 1979394087 is about 44490.3819605991. The cubic root of 1979394087 is about 1255.5791334617.

The spelling of 1979394087 in words is "one billion, nine hundred seventy-nine million, three hundred ninety-four thousand, eighty-seven".