1979396577 has 12 divisors (see below), whose sum is σ = 2859577344. Its totient is φ = 1319390520.

The previous prime is 1979396567. The next prime is 1979396621. The reversal of 1979396577 is 7756939791.

1979396577 is a `hidden beast` number, since 197 + 9 + 396 + 57 + 7 = 666.

It is not a de Polignac number, because 1979396577 - 2⁴ = 1979396561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1979396567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62752 + ... + 88862.

It is an arithmetic number, because the mean of its divisors is an integer number (238298112).

Almost surely, 2^1979396577 is an apocalyptic number.

It is an amenable number.

1979396577 is a deficient number, since it is larger than the sum of its proper divisors (880180767).

1979396577 is a wasteful number, since it uses less digits than its factorization.

1979396577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34540 (or 34537 counting only the distinct ones).

The product of its digits is 22504230, while the sum is 63.

The square root of 1979396577 is about 44490.4099441666. The cubic root of 1979396577 is about 1255.5796599512.

The spelling of 1979396577 in words is "one billion, nine hundred seventy-nine million, three hundred ninety-six thousand, five hundred seventy-seven".