197979705 has 96 divisors (see below), whose sum is σ = 453143808. Its totient is φ = 77414400.

The previous prime is 197979703. The next prime is 197979721. The reversal of 197979705 is 507979791.

It is not a de Polignac number, because 197979705 - 2¹ = 197979703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197979701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 57225 + ... + 60585.

It is an arithmetic number, because the mean of its divisors is an integer number (4720248).

Almost surely, 2^197979705 is an apocalyptic number.

197979705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197979705 is an abundant number, since it is smaller than the sum of its proper divisors (255164103).

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

197979705 is a wasteful number, since it uses less digits than its factorization.

197979705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407 (or 3404 counting only the distinct ones).

The product of its (nonzero) digits is 1250235, while the sum is 54.

The square root of 197979705 is about 14070.5261095668. The cubic root of 197979705 is about 582.8277536827.

The spelling of 197979705 in words is "one hundred ninety-seven million, nine hundred seventy-nine thousand, seven hundred five".