197312499 has 6 divisors (see below), whose sum is σ = 285006956. Its totient is φ = 131541660.

The previous prime is 197312449. The next prime is 197312537. The reversal of 197312499 is 994213791.

It is not a de Polignac number, because 197312499 - 2⁷ = 197312371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197312449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10961797 + ... + 10961814.

Almost surely, 2^197312499 is an apocalyptic number.

197312499 is a deficient number, since it is larger than the sum of its proper divisors (87694457).

197312499 is a wasteful number, since it uses less digits than its factorization.

197312499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21923617 (or 21923614 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 197312499 is about 14046.7967522848. The cubic root of 197312499 is about 582.1722928453.

The spelling of 197312499 in words is "one hundred ninety-seven million, three hundred twelve thousand, four hundred ninety-nine".