139240267 has 2 divisors, whose sum is σ = 139240268. Its totient is φ = 139240266.

The previous prime is 139240237. The next prime is 139240289. The reversal of 139240267 is 762042931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139240267 - 2²³ = 130851659 is a prime.

It is not a weakly prime, because it can be changed into another prime (139240237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69620133 + 69620134.

It is an arithmetic number, because the mean of its divisors is an integer number (69620134).

Almost surely, 2^139240267 is an apocalyptic number.

139240267 is a deficient number, since it is larger than the sum of its proper divisors (1).

139240267 is an equidigital number, since it uses as much as digits as its factorization.

139240267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 139240267 is about 11800.0113135539. The cubic root of 139240267 is about 518.3084419441.

The spelling of 139240267 in words is "one hundred thirty-nine million, two hundred forty thousand, two hundred sixty-seven".