139074191 has 2 divisors, whose sum is σ = 139074192. Its totient is φ = 139074190.

The previous prime is 139074121. The next prime is 139074193. The reversal of 139074191 is 191470931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139074191 is a prime.

Together with 139074193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139074193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69537095 + 69537096.

It is an arithmetic number, because the mean of its divisors is an integer number (69537096).

Almost surely, 2^139074191 is an apocalyptic number.

139074191 is a deficient number, since it is larger than the sum of its proper divisors (1).

139074191 is an equidigital number, since it uses as much as digits as its factorization.

139074191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 139074191 is about 11792.9721020615. The cubic root of 139074191 is about 518.1022926738.

The spelling of 139074191 in words is "one hundred thirty-nine million, seventy-four thousand, one hundred ninety-one".