131630403 has 8 divisors (see below), whose sum is σ = 183138048. Its totient is φ = 83938184.

The previous prime is 131630399. The next prime is 131630431. The reversal of 131630403 is 304036131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131630403 - 2² = 131630399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131630403.

It is not an unprimeable number, because it can be changed into a prime (131630453) 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 in 7 ways as a sum of consecutive naturals, for example, 953775 + ... + 953912.

It is an arithmetic number, because the mean of its divisors is an integer number (22892256).

Almost surely, 2^131630403 is an apocalyptic number.

131630403 is a deficient number, since it is larger than the sum of its proper divisors (51507645).

131630403 is a wasteful number, since it uses less digits than its factorization.

131630403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907713.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 131630403 is about 11473.0293732737. The cubic root of 131630403 is about 508.6886765527.

Adding to 131630403 its reverse (304036131), we get a palindrome (435666534).

The spelling of 131630403 in words is "one hundred thirty-one million, six hundred thirty thousand, four hundred three".