199490697 has 12 divisors (see below), whose sum is σ = 329318080. Its totient is φ = 113994648.

The previous prime is 199490659. The next prime is 199490723. The reversal of 199490697 is 796094991.

199490697 is a `hidden beast` number, since 1 + 99 + 490 + 69 + 7 = 666.

It is not a de Polignac number, because 199490697 - 2¹² = 199486601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199490657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1583197 + ... + 1583322.

Almost surely, 2^199490697 is an apocalyptic number.

It is an amenable number.

199490697 is a deficient number, since it is larger than the sum of its proper divisors (129827383).

199490697 is a wasteful number, since it uses less digits than its factorization.

199490697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166532 (or 3166529 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 199490697 is about 14124.1175653561. The cubic root of 199490697 is about 584.3067220103.

It can be divided in two parts, 1994906 and 97, that added together give a triangular number (1995003 = T₁₉₉₇).

The spelling of 199490697 in words is "one hundred ninety-nine million, four hundred ninety thousand, six hundred ninety-seven".