197421136 has 40 divisors (see below), whose sum is σ = 441828864. Its totient is φ = 84456960.

The previous prime is 197421097. The next prime is 197421149. The reversal of 197421136 is 631124791.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30000 + ... + 35983.

Almost surely, 2^197421136 is an apocalyptic number.

197421136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

197421136 is an abundant number, since it is smaller than the sum of its proper divisors (244407728).

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

197421136 is a wasteful number, since it uses less digits than its factorization.

197421136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66019 (or 66013 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 197421136 is about 14050.6631871951. The cubic root of 197421136 is about 582.2791180556.

The spelling of 197421136 in words is "one hundred ninety-seven million, four hundred twenty-one thousand, one hundred thirty-six".