1979365605 has 16 divisors (see below), whose sum is σ = 3619411584. Its totient is φ = 904852800.

The previous prime is 1979365543. The next prime is 1979365621. The reversal of 1979365605 is 5065639791.

It is not a de Polignac number, because 1979365605 - 2⁹ = 1979365093 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9425446 + ... + 9425655.

It is an arithmetic number, because the mean of its divisors is an integer number (226213224).

Almost surely, 2^1979365605 is an apocalyptic number.

1979365605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1979365605 is a deficient number, since it is larger than the sum of its proper divisors (1640045979).

1979365605 is a wasteful number, since it uses less digits than its factorization.

1979365605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18851116.

The product of its (nonzero) digits is 1530900, while the sum is 51.

The square root of 1979365605 is about 44490.0618677925. The cubic root of 1979365605 is about 1255.5731111513.

The spelling of 1979365605 in words is "one billion, nine hundred seventy-nine million, three hundred sixty-five thousand, six hundred five".