131630761 has 4 divisors (see below), whose sum is σ = 131724432. Its totient is φ = 131537092.

The previous prime is 131630749. The next prime is 131630773. The reversal of 131630761 is 167036131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (131630749) and next prime (131630773).

It is a cyclic number.

It is not a de Polignac number, because 131630761 - 2⁹ = 131630249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131630791) 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, 44695 + ... + 47548.

It is an arithmetic number, because the mean of its divisors is an integer number (32931108).

Almost surely, 2^131630761 is an apocalyptic number.

It is an amenable number.

131630761 is a deficient number, since it is larger than the sum of its proper divisors (93671).

131630761 is an equidigital number, since it uses as much as digits as its factorization.

131630761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93670.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 131630761 is about 11473.0449750709. The cubic root of 131630761 is about 508.6891377186.

Adding to 131630761 its reverse (167036131), we get a palindrome (298666892).

The spelling of 131630761 in words is "one hundred thirty-one million, six hundred thirty thousand, seven hundred sixty-one".