139994567 has 2 divisors, whose sum is σ = 139994568. Its totient is φ = 139994566.

The previous prime is 139994549. The next prime is 139994579. The reversal of 139994567 is 765499931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139994567 - 2¹⁸ = 139732423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139994467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69997283 + 69997284.

It is an arithmetic number, because the mean of its divisors is an integer number (69997284).

Almost surely, 2^139994567 is an apocalyptic number.

139994567 is a deficient number, since it is larger than the sum of its proper divisors (1).

139994567 is an equidigital number, since it uses as much as digits as its factorization.

139994567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 53.

The square root of 139994567 is about 11831.9299778185. The cubic root of 139994567 is about 519.2426932362.

The spelling of 139994567 in words is "one hundred thirty-nine million, nine hundred ninety-four thousand, five hundred sixty-seven".