1979863854 has 16 divisors (see below), whose sum is σ = 3960340560. Its totient is φ = 659852480.

The previous prime is 1979863841. The next prime is 1979863867. The reversal of 1979863854 is 4583689791.

It is an interprime number because it is at equal distance from previous prime (1979863841) and next prime (1979863867).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23794 + ... + 67274.

It is an arithmetic number, because the mean of its divisors is an integer number (247521285).

Almost surely, 2^1979863854 is an apocalyptic number.

1979863854 is an abundant number, since it is smaller than the sum of its proper divisors (1980476706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1979863854 is a wasteful number, since it uses less digits than its factorization.

1979863854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51075.

The product of its digits is 13063680, while the sum is 60.

The square root of 1979863854 is about 44495.6610693672. The cubic root of 1979863854 is about 1255.6784539207.

The spelling of 1979863854 in words is "one billion, nine hundred seventy-nine million, eight hundred sixty-three thousand, eight hundred fifty-four".