199642149 has 24 divisors (see below), whose sum is σ = 335791872. Its totient is φ = 111926880.

The previous prime is 199642147. The next prime is 199642151. The reversal of 199642149 is 941246991.

199642149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (199642147) and next prime (199642151).

It is not a de Polignac number, because 199642149 - 2¹ = 199642147 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199642147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26557 + ... + 33234.

It is an arithmetic number, because the mean of its divisors is an integer number (13991328).

Almost surely, 2^199642149 is an apocalyptic number.

It is an amenable number.

199642149 is a deficient number, since it is larger than the sum of its proper divisors (136149723).

199642149 is a wasteful number, since it uses less digits than its factorization.

199642149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59857 (or 59854 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 199642149 is about 14129.4780158363. The cubic root of 199642149 is about 584.4545518550.

The spelling of 199642149 in words is "one hundred ninety-nine million, six hundred forty-two thousand, one hundred forty-nine".