13771631 has 2 divisors, whose sum is σ = 13771632. Its totient is φ = 13771630.

The previous prime is 13771627. The next prime is 13771633. The reversal of 13771631 is 13617731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13771631 - 2² = 13771627 is a prime.

It is a super-2 number, since 2×13771631² = 379315640800322, which contains 22 as substring.

Together with 13771633, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13771594 and 13771603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13771633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6885815 + 6885816.

It is an arithmetic number, because the mean of its divisors is an integer number (6885816).

Almost surely, 2^13771631 is an apocalyptic number.

13771631 is a deficient number, since it is larger than the sum of its proper divisors (1).

13771631 is an equidigital number, since it uses as much as digits as its factorization.

13771631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646, while the sum is 29.

The square root of 13771631 is about 3711.0148207734. The cubic root of 13771631 is about 239.6965551576.

The spelling of 13771631 in words is "thirteen million, seven hundred seventy-one thousand, six hundred thirty-one".