139855007 has 2 divisors, whose sum is σ = 139855008. Its totient is φ = 139855006.

The previous prime is 139854997. The next prime is 139855061. The reversal of 139855007 is 700558931.

It is a weak prime.

It is an emirp because it is prime and its reverse (700558931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139855007 - 2²⁰ = 138806431 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139855607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69927503 + 69927504.

It is an arithmetic number, because the mean of its divisors is an integer number (69927504).

Almost surely, 2^139855007 is an apocalyptic number.

139855007 is a deficient number, since it is larger than the sum of its proper divisors (1).

139855007 is an equidigital number, since it uses as much as digits as its factorization.

139855007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 139855007 is about 11826.0309064369. The cubic root of 139855007 is about 519.0700922433.

The spelling of 139855007 in words is "one hundred thirty-nine million, eight hundred fifty-five thousand, seven".