1206317631 has 4 divisors (see below), whose sum is σ = 1608423512. Its totient is φ = 804211752.

The previous prime is 1206317587. The next prime is 1206317633. The reversal of 1206317631 is 1367136021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1206317631 - 2¹⁰ = 1206316607 is a prime.

It is a super-2 number, since 2×1206317631² = 2910404453722904322, 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 (1206317633) 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, 201052936 + ... + 201052941.

It is an arithmetic number, because the mean of its divisors is an integer number (402105878).

Almost surely, 2^1206317631 is an apocalyptic number.

1206317631 is a deficient number, since it is larger than the sum of its proper divisors (402105881).

1206317631 is an equidigital number, since it uses as much as digits as its factorization.

1206317631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402105880.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 1206317631 is about 34732.0835971584. The cubic root of 1206317631 is about 1064.5201629548.

The spelling of 1206317631 in words is "one billion, two hundred six million, three hundred seventeen thousand, six hundred thirty-one".