199625501 has 2 divisors, whose sum is σ = 199625502. Its totient is φ = 199625500.

The previous prime is 199625477. The next prime is 199625519. The reversal of 199625501 is 105526991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119880601 + 79744900 = 10949^2 + 8930^2 .

It is an emirp because it is prime and its reverse (105526991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199625501 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199625561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99812750 + 99812751.

It is an arithmetic number, because the mean of its divisors is an integer number (99812751).

Almost surely, 2^199625501 is an apocalyptic number.

It is an amenable number.

199625501 is a deficient number, since it is larger than the sum of its proper divisors (1).

199625501 is an equidigital number, since it uses as much as digits as its factorization.

199625501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 38.

The square root of 199625501 is about 14128.8888805879. Note that the first 5 decimals coincide. The cubic root of 199625501 is about 584.4383056701.

The spelling of 199625501 in words is "one hundred ninety-nine million, six hundred twenty-five thousand, five hundred one".