199923946 has 4 divisors (see below), whose sum is σ = 299885922. Its totient is φ = 99961972.

The previous prime is 199923943. The next prime is 199923953. The reversal of 199923946 is 649329991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 199515625 + 408321 = 14125^2 + 639^2 .

It is a junction number, because it is equal to n+sod(n) for n = 199923893 and 199923902.

It is not an unprimeable number, because it can be changed into a prime (199923943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49980985 + ... + 49980988.

Almost surely, 2^199923946 is an apocalyptic number.

199923946 is a deficient number, since it is larger than the sum of its proper divisors (99961976).

199923946 is an equidigital number, since it uses as much as digits as its factorization.

199923946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99961975.

The product of its digits is 944784, while the sum is 52.

The square root of 199923946 is about 14139.4464530971. The cubic root of 199923946 is about 584.7294104960.

The spelling of 199923946 in words is "one hundred ninety-nine million, nine hundred twenty-three thousand, nine hundred forty-six".