631409745 has 16 divisors (see below), whose sum is σ = 1024486272. Its totient is φ = 332008320.

The previous prime is 631409743. The next prime is 631409747. The reversal of 631409745 is 547904136.

It is an interprime number because it is at equal distance from previous prime (631409743) and next prime (631409747).

It is not a de Polignac number, because 631409745 - 2¹ = 631409743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631409741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295372 + ... + 297501.

It is an arithmetic number, because the mean of its divisors is an integer number (64030392).

Almost surely, 2^631409745 is an apocalyptic number.

It is an amenable number.

631409745 is a deficient number, since it is larger than the sum of its proper divisors (393076527).

631409745 is a wasteful number, since it uses less digits than its factorization.

631409745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592952.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 631409745 is about 25127.8678960233. The cubic root of 631409745 is about 857.9008407963.

The spelling of 631409745 in words is "six hundred thirty-one million, four hundred nine thousand, seven hundred forty-five".