1979195505 has 96 divisors (see below), whose sum is σ = 3929990400. Its totient is φ = 845107200.

The previous prime is 1979195489. The next prime is 1979195551. The reversal of 1979195505 is 5055919791.

It is not a de Polignac number, because 1979195505 - 2⁴ = 1979195489 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1886221 + ... + 1887269.

It is an arithmetic number, because the mean of its divisors is an integer number (40937400).

Almost surely, 2^1979195505 is an apocalyptic number.

1979195505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1979195505 is a deficient number, since it is larger than the sum of its proper divisors (1950794895).

1979195505 is a wasteful number, since it uses less digits than its factorization.

1979195505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 637875, while the sum is 51.

The square root of 1979195505 is about 44488.1501638358. The cubic root of 1979195505 is about 1255.5371435491.

The spelling of 1979195505 in words is "one billion, nine hundred seventy-nine million, one hundred ninety-five thousand, five hundred five".