139027517 has 2 divisors, whose sum is σ = 139027518. Its totient is φ = 139027516.

The previous prime is 139027507. The next prime is 139027519. The reversal of 139027517 is 715720931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136913401 + 2114116 = 11701^2 + 1454^2 .

It is a cyclic number.

It is not a de Polignac number, because 139027517 - 2⁴ = 139027501 is a prime.

Together with 139027519, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_7860266 and since 139027517 and 7860266 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139027519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69513758 + 69513759.

It is an arithmetic number, because the mean of its divisors is an integer number (69513759).

Almost surely, 2^139027517 is an apocalyptic number.

It is an amenable number.

139027517 is a deficient number, since it is larger than the sum of its proper divisors (1).

139027517 is an equidigital number, since it uses as much as digits as its factorization.

139027517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 139027517 is about 11790.9930455412. The cubic root of 139027517 is about 518.0443269412.

The spelling of 139027517 in words is "one hundred thirty-nine million, twenty-seven thousand, five hundred seventeen".