131993867 has 2 divisors, whose sum is σ = 131993868. Its totient is φ = 131993866.

The previous prime is 131993857. The next prime is 131993887. The reversal of 131993867 is 768399131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131993867 - 2¹⁶ = 131928331 is a prime.

It is a super-2 number, since 2×131993867² = 34844761851227378, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131993857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65996933 + 65996934.

It is an arithmetic number, because the mean of its divisors is an integer number (65996934).

Almost surely, 2^131993867 is an apocalyptic number.

131993867 is a deficient number, since it is larger than the sum of its proper divisors (1).

131993867 is an equidigital number, since it uses as much as digits as its factorization.

131993867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 131993867 is about 11488.8583854098. The cubic root of 131993867 is about 509.1564512254.

The spelling of 131993867 in words is "one hundred thirty-one million, nine hundred ninety-three thousand, eight hundred sixty-seven".