1979671085 has 32 divisors (see below), whose sum is σ = 2874009600. Its totient is φ = 1278780480.

The previous prime is 1979671081. The next prime is 1979671103. The reversal of 1979671085 is 5801769791.

It is not a de Polignac number, because 1979671085 - 2² = 1979671081 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979671081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110720 + ... + 127350.

It is an arithmetic number, because the mean of its divisors is an integer number (89812800).

Almost surely, 2^1979671085 is an apocalyptic number.

It is an amenable number.

1979671085 is a deficient number, since it is larger than the sum of its proper divisors (894338515).

1979671085 is a wasteful number, since it uses less digits than its factorization.

1979671085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16841.

The product of its (nonzero) digits is 952560, while the sum is 53.

The square root of 1979671085 is about 44493.4948616087. The cubic root of 1979671085 is about 1255.6376996476.

The spelling of 1979671085 in words is "one billion, nine hundred seventy-nine million, six hundred seventy-one thousand, eighty-five".