199757144 has 32 divisors (see below), whose sum is σ = 386527680. Its totient is φ = 96728064.

The previous prime is 199757141. The next prime is 199757147. The reversal of 199757144 is 441757991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (199757141) and next prime (199757147).

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199757141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33734 + ... + 39210.

It is an arithmetic number, because the mean of its divisors is an integer number (12078990).

Almost surely, 2^199757144 is an apocalyptic number.

It is an amenable number.

199757144 is a deficient number, since it is larger than the sum of its proper divisors (186770536).

199757144 is a wasteful number, since it uses less digits than its factorization.

199757144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5627 (or 5623 counting only the distinct ones).

The product of its digits is 317520, while the sum is 47.

The square root of 199757144 is about 14133.5467593948. The cubic root of 199757144 is about 584.5667466852.

The spelling of 199757144 in words is "one hundred ninety-nine million, seven hundred fifty-seven thousand, one hundred forty-four".