197145900 has 432 divisors, whose sum is σ = 783560960. Its totient is φ = 41990400.

The previous prime is 197145887. The next prime is 197145931. The reversal of 197145900 is 9541791.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3231870 + ... + 3231930.

Almost surely, 2^197145900 is an apocalyptic number.

197145900 is a gapful number since it is divisible by the number (10) 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 197145900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391780480).

197145900 is an abundant number, since it is smaller than the sum of its proper divisors (586415060).

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

197145900 is a wasteful number, since it uses less digits than its factorization.

197145900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 197145900 is about 14040.8653579471. The cubic root of 197145900 is about 582.0083960953.

The spelling of 197145900 in words is "one hundred ninety-seven million, one hundred forty-five thousand, nine hundred".