631468491 has 4 divisors (see below), whose sum is σ = 841957992. Its totient is φ = 420978992.

The previous prime is 631468489. The next prime is 631468499. The reversal of 631468491 is 194864136.

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 631468491 - 2¹ = 631468489 is a prime.

It is a super-3 number, since 3×631468491³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (631468499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105244746 + ... + 105244751.

It is an arithmetic number, because the mean of its divisors is an integer number (210489498).

Almost surely, 2^631468491 is an apocalyptic number.

631468491 is a deficient number, since it is larger than the sum of its proper divisors (210489501).

631468491 is a wasteful number, since it uses less digits than its factorization.

631468491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210489500.

The product of its digits is 124416, while the sum is 42.

The square root of 631468491 is about 25129.0368100331. The cubic root of 631468491 is about 857.9274461717.

The spelling of 631468491 in words is "six hundred thirty-one million, four hundred sixty-eight thousand, four hundred ninety-one".