197979792 has 80 divisors (see below), whose sum is σ = 527204352. Its totient is φ = 63987840.

The previous prime is 197979787. The next prime is 197979797. The reversal of 197979792 is 297979791.

It is an interprime number because it is at equal distance from previous prime (197979787) and next prime (197979797).

It is not an unprimeable number, because it can be changed into a prime (197979797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286167 + ... + 286857.

Almost surely, 2^197979792 is an apocalyptic number.

197979792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197979792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263602176).

197979792 is an abundant number, since it is smaller than the sum of its proper divisors (329224560).

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

197979792 is a wasteful number, since it uses less digits than its factorization.

197979792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 870 counting only the distinct ones).

The product of its digits is 4500846, while the sum is 60.

The square root of 197979792 is about 14070.5292011353. The cubic root of 197979792 is about 582.8278390551.

Subtracting 197979792 from its reverse (297979791), we obtain a palindrome (99999999).

The spelling of 197979792 in words is "one hundred ninety-seven million, nine hundred seventy-nine thousand, seven hundred ninety-two".