199487497 has 12 divisors (see below), whose sum is σ = 220689028. Its totient is φ = 180180000.

The previous prime is 199487489. The next prime is 199487501. The reversal of 199487497 is 794784991.

199487497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 58614336 + 140873161 = 7656^2 + 11869^2 .

It is not a de Polignac number, because 199487497 - 2³ = 199487489 is a prime.

It is a super-2 number, since 2×199487497² = 79590522918650018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199487447) 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, 13747 + ... + 24247.

Almost surely, 2^199487497 is an apocalyptic number.

It is an amenable number.

199487497 is a deficient number, since it is larger than the sum of its proper divisors (21201531).

199487497 is a wasteful number, since it uses less digits than its factorization.

199487497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10680 (or 10669 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 58.

The square root of 199487497 is about 14124.0042834884. The cubic root of 199487497 is about 584.3035977351.

The spelling of 199487497 in words is "one hundred ninety-nine million, four hundred eighty-seven thousand, four hundred ninety-seven".