131694403 has 2 divisors, whose sum is σ = 131694404. Its totient is φ = 131694402.

The previous prime is 131694379. The next prime is 131694449. The reversal of 131694403 is 304496131.

It is a weak prime.

It is an emirp because it is prime and its reverse (304496131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131694403 - 2²⁵ = 98139971 is a prime.

It is not a weakly prime, because it can be changed into another prime (131694473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65847201 + 65847202.

It is an arithmetic number, because the mean of its divisors is an integer number (65847202).

Almost surely, 2^131694403 is an apocalyptic number.

131694403 is a deficient number, since it is larger than the sum of its proper divisors (1).

131694403 is an equidigital number, since it uses as much as digits as its factorization.

131694403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 131694403 is about 11475.8181843388. The cubic root of 131694403 is about 508.7711063450.

The spelling of 131694403 in words is "one hundred thirty-one million, six hundred ninety-four thousand, four hundred three".