3131961673 has 6 divisors (see below), whose sum is σ = 3153144974. Its totient is φ = 3110919744.

The previous prime is 3131961671. The next prime is 3131961689. The reversal of 3131961673 is 3761691313.

It can be written as a sum of positive squares in 3 ways, for example, as 79067664 + 3052894009 = 8892^2 + 55253^2 .

It is not a de Polignac number, because 3131961673 - 2¹ = 3131961671 is a prime.

It is a super-2 number, since 2×3131961673² = 19618367842281917858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131961671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48336 + ... + 92737.

Almost surely, 2^3131961673 is an apocalyptic number.

It is an amenable number.

3131961673 is a deficient number, since it is larger than the sum of its proper divisors (21183301).

3131961673 is an equidigital number, since it uses as much as digits as its factorization.

3131961673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141371 (or 141222 counting only the distinct ones).

The product of its digits is 61236, while the sum is 40.

The square root of 3131961673 is about 55963.9318936759. The cubic root of 3131961673 is about 1463.0937202025.

The spelling of 3131961673 in words is "three billion, one hundred thirty-one million, nine hundred sixty-one thousand, six hundred seventy-three".