197902397 has 20 divisors (see below), whose sum is σ = 248918880. Its totient is φ = 154129800.

The previous prime is 197902387. The next prime is 197902427. The reversal of 197902397 is 793209791.

It is not a de Polignac number, because 197902397 - 2⁸ = 197902141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197902337) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 101522 + ... + 103452.

It is an arithmetic number, because the mean of its divisors is an integer number (12445944).

Almost surely, 2^197902397 is an apocalyptic number.

It is an amenable number.

197902397 is a deficient number, since it is larger than the sum of its proper divisors (51016483).

197902397 is an frugal number, since it uses more digits than its factorization.

197902397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982 (or 1949 counting only the distinct ones).

The product of its (nonzero) digits is 214326, while the sum is 47.

The square root of 197902397 is about 14067.7786803745. The cubic root of 197902397 is about 582.7518820776.

The spelling of 197902397 in words is "one hundred ninety-seven million, nine hundred two thousand, three hundred ninety-seven".