131623705 has 16 divisors (see below), whose sum is σ = 161803008. Its totient is φ = 102760000.

The previous prime is 131623703. The next prime is 131623729. The reversal of 131623705 is 507326131.

It is not a de Polignac number, because 131623705 - 2¹ = 131623703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131623703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34020 + ... + 37690.

It is an arithmetic number, because the mean of its divisors is an integer number (10112688).

Almost surely, 2^131623705 is an apocalyptic number.

It is an amenable number.

131623705 is a deficient number, since it is larger than the sum of its proper divisors (30179303).

131623705 is a wasteful number, since it uses less digits than its factorization.

131623705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 131623705 is about 11472.7374675794. The cubic root of 131623705 is about 508.6800482154.

Adding to 131623705 its reverse (507326131), we get a palindrome (638949836).

The spelling of 131623705 in words is "one hundred thirty-one million, six hundred twenty-three thousand, seven hundred five".