131722667 has 2 divisors, whose sum is σ = 131722668. Its totient is φ = 131722666.

The previous prime is 131722663. The next prime is 131722673. The reversal of 131722667 is 766227131.

It is a weak prime.

It is an emirp because it is prime and its reverse (766227131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131722667 - 2² = 131722663 is a prime.

It is a super-2 number, since 2×131722667² = 34701722003185778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131722663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65861333 + 65861334.

It is an arithmetic number, because the mean of its divisors is an integer number (65861334).

Almost surely, 2^131722667 is an apocalyptic number.

131722667 is a deficient number, since it is larger than the sum of its proper divisors (1).

131722667 is an equidigital number, since it uses as much as digits as its factorization.

131722667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 131722667 is about 11477.0495773086. The cubic root of 131722667 is about 508.8075009010.

Adding to 131722667 its reverse (766227131), we get a palindrome (897949798).

The spelling of 131722667 in words is "one hundred thirty-one million, seven hundred twenty-two thousand, six hundred sixty-seven".