131633785 has 4 divisors (see below), whose sum is σ = 157960548. Its totient is φ = 105307024.

The previous prime is 131633783. The next prime is 131633809. The reversal of 131633785 is 587336131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 587336131 = 181 ⋅3244951.

It can be written as a sum of positive squares in 2 ways, for example, as 27164944 + 104468841 = 5212^2 + 10221^2 .

It is a cyclic number.

It is not a de Polignac number, because 131633785 - 2¹ = 131633783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131633783) 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, 13163374 + ... + 13163383.

It is an arithmetic number, because the mean of its divisors is an integer number (39490137).

Almost surely, 2^131633785 is an apocalyptic number.

It is an amenable number.

131633785 is a deficient number, since it is larger than the sum of its proper divisors (26326763).

131633785 is an equidigital number, since it uses as much as digits as its factorization.

131633785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26326762.

The product of its digits is 45360, while the sum is 37.

The square root of 131633785 is about 11473.1767614728. The cubic root of 131633785 is about 508.6930331206.

The spelling of 131633785 in words is "one hundred thirty-one million, six hundred thirty-three thousand, seven hundred eighty-five".