197497992 has 64 divisors (see below), whose sum is σ = 504610560. Its totient is φ = 64396800.

The previous prime is 197497991. The next prime is 197497997. The reversal of 197497992 is 299794791.

It is not an unprimeable number, because it can be changed into a prime (197497991) 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, 458017 + ... + 458447.

It is an arithmetic number, because the mean of its divisors is an integer number (7884540).

Almost surely, 2^197497992 is an apocalyptic number.

197497992 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 197497992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252305280).

197497992 is an abundant number, since it is smaller than the sum of its proper divisors (307112568).

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

197497992 is a wasteful number, since it uses less digits than its factorization.

197497992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 810 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 57.

The square root of 197497992 is about 14053.3978809397. The cubic root of 197497992 is about 582.3546686253.

The spelling of 197497992 in words is "one hundred ninety-seven million, four hundred ninety-seven thousand, nine hundred ninety-two".