631125199 has 4 divisors (see below), whose sum is σ = 631291864. Its totient is φ = 630958536.

The previous prime is 631125197. The next prime is 631125211. The reversal of 631125199 is 991521136.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 631125199 - 2¹ = 631125197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631125197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77517 + ... + 85270.

It is an arithmetic number, because the mean of its divisors is an integer number (157822966).

Almost surely, 2^631125199 is an apocalyptic number.

631125199 is a deficient number, since it is larger than the sum of its proper divisors (166665).

631125199 is a wasteful number, since it uses less digits than its factorization.

631125199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166664.

The product of its digits is 14580, while the sum is 37.

The square root of 631125199 is about 25122.2052973062. The cubic root of 631125199 is about 857.7719498854.

The spelling of 631125199 in words is "six hundred thirty-one million, one hundred twenty-five thousand, one hundred ninety-nine".