131106649 has 4 divisors (see below), whose sum is σ = 131184036. Its totient is φ = 131029264.

The previous prime is 131106589. The next prime is 131106667. The reversal of 131106649 is 946601131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65610000 + 65496649 = 8100^2 + 8093^2 .

It is a cyclic number.

It is not a de Polignac number, because 131106649 - 2¹¹ = 131104601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131106649.

It is not an unprimeable number, because it can be changed into a prime (131106149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36094 + ... + 39559.

It is an arithmetic number, because the mean of its divisors is an integer number (32796009).

Almost surely, 2^131106649 is an apocalyptic number.

It is an amenable number.

131106649 is a deficient number, since it is larger than the sum of its proper divisors (77387).

131106649 is an equidigital number, since it uses as much as digits as its factorization.

131106649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77386.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 131106649 is about 11450.1811776059. The cubic root of 131106649 is about 508.0130933137.

The spelling of 131106649 in words is "one hundred thirty-one million, one hundred six thousand, six hundred forty-nine".