631672557 has 4 divisors (see below), whose sum is σ = 842230080. Its totient is φ = 421115036.

The previous prime is 631672541. The next prime is 631672597. The reversal of 631672557 is 755276136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 631672557 - 2⁴ = 631672541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631672597) 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, 105278757 + ... + 105278762.

It is an arithmetic number, because the mean of its divisors is an integer number (210557520).

Almost surely, 2^631672557 is an apocalyptic number.

It is an amenable number.

631672557 is a deficient number, since it is larger than the sum of its proper divisors (210557523).

631672557 is a wasteful number, since it uses less digits than its factorization.

631672557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210557522.

The product of its digits is 264600, while the sum is 42.

The square root of 631672557 is about 25133.0968445992. The cubic root of 631672557 is about 858.0198524539.

The spelling of 631672557 in words is "six hundred thirty-one million, six hundred seventy-two thousand, five hundred fifty-seven".