197021431903 has 8 divisors (see below), whose sum is σ = 198828704160. Its totient is φ = 195221151840.

The previous prime is 197021431843. The next prime is 197021431907. The reversal of 197021431903 is 309134120791.

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 197021431903 - 2³³ = 188431497311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197021431907) 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, 1691428 + ... + 1804153.

It is an arithmetic number, because the mean of its divisors is an integer number (24853588020).

Almost surely, 2^197021431903 is an apocalyptic number.

197021431903 is a deficient number, since it is larger than the sum of its proper divisors (1807272257).

197021431903 is a wasteful number, since it uses less digits than its factorization.

197021431903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496097.

The product of its (nonzero) digits is 40824, while the sum is 40.

The spelling of 197021431903 in words is "one hundred ninety-seven billion, twenty-one million, four hundred thirty-one thousand, nine hundred three".