131403705 has 8 divisors (see below), whose sum is σ = 210245952. Its totient is φ = 70081968.

The previous prime is 131403703. The next prime is 131403709. The reversal of 131403705 is 507304131.

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

It is not a de Polignac number, because 131403705 - 2¹ = 131403703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131403703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4380109 + ... + 4380138.

It is an arithmetic number, because the mean of its divisors is an integer number (26280744).

Almost surely, 2^131403705 is an apocalyptic number.

131403705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131403705 is a deficient number, since it is larger than the sum of its proper divisors (78842247).

131403705 is an equidigital number, since it uses as much as digits as its factorization.

131403705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8760255.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 131403705 is about 11463.1455107226. The cubic root of 131403705 is about 508.3964822262.

Adding to 131403705 its reverse (507304131), we get a palindrome (638707836).

The spelling of 131403705 in words is "one hundred thirty-one million, four hundred three thousand, seven hundred five".