197489513 has 12 divisors (see below), whose sum is σ = 217366668. Its totient is φ = 179300160.

The previous prime is 197489503. The next prime is 197489519. The reversal of 197489513 is 315984791.

It can be written as a sum of positive squares in 6 ways, for example, as 139546969 + 57942544 = 11813^2 + 7612^2 .

It is not a de Polignac number, because 197489513 - 2¹⁶ = 197423977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197489519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 731 + ... + 19887.

It is an arithmetic number, because the mean of its divisors is an integer number (18113889).

Almost surely, 2^197489513 is an apocalyptic number.

197489513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

197489513 is a deficient number, since it is larger than the sum of its proper divisors (19877155).

197489513 is a wasteful number, since it uses less digits than its factorization.

197489513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19244 (or 19231 counting only the distinct ones).

The product of its digits is 272160, while the sum is 47.

The square root of 197489513 is about 14053.0962068862. The cubic root of 197489513 is about 582.3463346066.

The spelling of 197489513 in words is "one hundred ninety-seven million, four hundred eighty-nine thousand, five hundred thirteen".