199623764 has 6 divisors (see below), whose sum is σ = 349341594. Its totient is φ = 99811880.

The previous prime is 199623763. The next prime is 199623817. The reversal of 199623764 is 467326991.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 192376900 + 7246864 = 13870^2 + 2692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199623763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24952967 + ... + 24952974.

It is an arithmetic number, because the mean of its divisors is an integer number (58223599).

Almost surely, 2^199623764 is an apocalyptic number.

It is an amenable number.

199623764 is a deficient number, since it is larger than the sum of its proper divisors (149717830).

199623764 is a wasteful number, since it uses less digits than its factorization.

199623764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49905945 (or 49905943 counting only the distinct ones).

The product of its digits is 489888, while the sum is 47.

The square root of 199623764 is about 14128.8274106523. The cubic root of 199623764 is about 584.4366105421.

The spelling of 199623764 in words is "one hundred ninety-nine million, six hundred twenty-three thousand, seven hundred sixty-four".