631606497 has 4 divisors (see below), whose sum is σ = 842142000. Its totient is φ = 421070996.

The previous prime is 631606487. The next prime is 631606499. The reversal of 631606497 is 794606136.

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 631606497 - 2¹⁶ = 631540961 is a prime.

It is a super-2 number, since 2×631606497² = 797853534105222018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (631606499) 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, 105267747 + ... + 105267752.

It is an arithmetic number, because the mean of its divisors is an integer number (210535500).

Almost surely, 2^631606497 is an apocalyptic number.

It is an amenable number.

631606497 is a deficient number, since it is larger than the sum of its proper divisors (210535503).

631606497 is a wasteful number, since it uses less digits than its factorization.

631606497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210535502.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 631606497 is about 25131.7826068904. The cubic root of 631606497 is about 857.9899409822.

The spelling of 631606497 in words is "six hundred thirty-one million, six hundred six thousand, four hundred ninety-seven".