197421955 has 8 divisors (see below), whose sum is σ = 239121072. Its totient is φ = 156461088.

The previous prime is 197421953. The next prime is 197421977. The reversal of 197421955 is 559124791.

197421955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197421955 - 2¹ = 197421953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197421953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183972 + ... + 185041.

It is an arithmetic number, because the mean of its divisors is an integer number (29890134).

Almost surely, 2^197421955 is an apocalyptic number.

197421955 is a deficient number, since it is larger than the sum of its proper divisors (41699117).

197421955 is a wasteful number, since it uses less digits than its factorization.

197421955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369125.

The product of its digits is 113400, while the sum is 43.

The square root of 197421955 is about 14050.6923316967. The cubic root of 197421955 is about 582.2799232479.

The spelling of 197421955 in words is "one hundred ninety-seven million, four hundred twenty-one thousand, nine hundred fifty-five".