131706394 has 4 divisors (see below), whose sum is σ = 197559594. Its totient is φ = 65853196.

The previous prime is 131706353. The next prime is 131706397. The reversal of 131706394 is 493607131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 121815369 + 9891025 = 11037^2 + 3145^2 .

It is not an unprimeable number, because it can be changed into a prime (131706397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32926597 + ... + 32926600.

Almost surely, 2^131706394 is an apocalyptic number.

131706394 is a deficient number, since it is larger than the sum of its proper divisors (65853200).

131706394 is an equidigital number, since it uses as much as digits as its factorization.

131706394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65853199.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 131706394 is about 11476.3406188558. The cubic root of 131706394 is about 508.7865473687.

The spelling of 131706394 in words is "one hundred thirty-one million, seven hundred six thousand, three hundred ninety-four".