139967 has 2 divisors, whose sum is σ = 139968. Its totient is φ = 139966.

The previous prime is 139943. The next prime is 139969. The reversal of 139967 is 769931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139967 - 2¹⁴ = 123583 is a prime.

It is a super-2 number, since 2×139967² = 39181522178, which contains 22 as substring.

Together with 139969, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 6, base 12 and base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139967.

It is not a weakly prime, because it can be changed into another prime (139969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69983 + 69984.

It is an arithmetic number, because the mean of its divisors is an integer number (69984).

139967 is a Friedman number, since it can be written as 6^7/(3-1)-9/9, using all its digits and the basic arithmetic operations.

2¹³⁹⁹⁶⁷ is an apocalyptic number.

139967 is a deficient number, since it is larger than the sum of its proper divisors (1).

139967 is an equidigital number, since it uses as much as digits as its factorization.

139967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 139967 is about 374.1216379735. The cubic root of 139967 is about 51.9208608811.

The spelling of 139967 in words is "one hundred thirty-nine thousand, nine hundred sixty-seven".