631364509 has 4 divisors (see below), whose sum is σ = 664594240. Its totient is φ = 598134780.

The previous prime is 631364501. The next prime is 631364519. The reversal of 631364509 is 905463136.

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 631364509 - 2³ = 631364501 is a prime.

It is a super-2 number, since 2×631364509² = 797242286449622162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631364501) 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, 16614837 + ... + 16614874.

It is an arithmetic number, because the mean of its divisors is an integer number (166148560).

Almost surely, 2^631364509 is an apocalyptic number.

It is an amenable number.

631364509 is a deficient number, since it is larger than the sum of its proper divisors (33229731).

631364509 is a wasteful number, since it uses less digits than its factorization.

631364509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33229730.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 631364509 is about 25126.9677637394. The cubic root of 631364509 is about 857.8803528171.

The spelling of 631364509 in words is "six hundred thirty-one million, three hundred sixty-four thousand, five hundred nine".