13131694 has 4 divisors (see below), whose sum is σ = 19697544. Its totient is φ = 6565846.

The previous prime is 13131661. The next prime is 13131719. The reversal of 13131694 is 49613131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49613131 = 139 ⋅356929.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282922 + ... + 3282925.

It is an arithmetic number, because the mean of its divisors is an integer number (4924386).

Almost surely, 2^13131694 is an apocalyptic number.

13131694 is a deficient number, since it is larger than the sum of its proper divisors (6565850).

13131694 is an equidigital number, since it uses as much as digits as its factorization.

13131694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6565849.

The product of its digits is 1944, while the sum is 28.

The square root of 13131694 is about 3623.7679285517. The cubic root of 13131694 is about 235.9247940967.

It can be divided in two parts, 1313 and 1694, that multiplied together give a palindrome (2224222).

The spelling of 13131694 in words is "thirteen million, one hundred thirty-one thousand, six hundred ninety-four".