3187631 has 2 divisors, whose sum is σ = 3187632. Its totient is φ = 3187630.

The previous prime is 3187621. The next prime is 3187643. The reversal of 3187631 is 1367813.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3187631 - 2⁶ = 3187567 is a prime.

It is a super-2 number, since 2×3187631² = 20321982784322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3187594 and 3187603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3187601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1593815 + 1593816.

It is an arithmetic number, because the mean of its divisors is an integer number (1593816).

Almost surely, 2^3187631 is an apocalyptic number.

3187631 is a deficient number, since it is larger than the sum of its proper divisors (1).

3187631 is an equidigital number, since it uses as much as digits as its factorization.

3187631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 29.

The square root of 3187631 is about 1785.3937940970. The cubic root of 3187631 is about 147.1711490154.

The spelling of 3187631 in words is "three million, one hundred eighty-seven thousand, six hundred thirty-one".