199923124 has 6 divisors (see below), whose sum is σ = 349865474. Its totient is φ = 99961560.

The previous prime is 199923121. The next prime is 199923181. The reversal of 199923124 is 421329991.

It can be written as a sum of positive squares in only one way, i.e., 131331600 + 68591524 = 11460^2 + 8282^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199923121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24990387 + ... + 24990394.

Almost surely, 2^199923124 is an apocalyptic number.

It is an amenable number.

199923124 is a deficient number, since it is larger than the sum of its proper divisors (149942350).

199923124 is a wasteful number, since it uses less digits than its factorization.

199923124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49980785 (or 49980783 counting only the distinct ones).

The product of its digits is 34992, while the sum is 40.

The square root of 199923124 is about 14139.4173854512. The cubic root of 199923124 is about 584.7286091109.

The spelling of 199923124 in words is "one hundred ninety-nine million, nine hundred twenty-three thousand, one hundred twenty-four".