197923887 has 18 divisors (see below), whose sum is σ = 332566728. Its totient is φ = 113099112.

The previous prime is 197923879. The next prime is 197923897. The reversal of 197923887 is 788329791.

197923887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 197923887 - 2³ = 197923879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197923837) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 223963 + ... + 224844.

Almost surely, 2^197923887 is an apocalyptic number.

197923887 is a deficient number, since it is larger than the sum of its proper divisors (134642841).

197923887 is a wasteful number, since it uses less digits than its factorization.

197923887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448827 (or 448817 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 197923887 is about 14068.5424618189. The cubic root of 197923887 is about 582.7729747726.

The spelling of 197923887 in words is "one hundred ninety-seven million, nine hundred twenty-three thousand, eight hundred eighty-seven".