139803161 has 2 divisors, whose sum is σ = 139803162. Its totient is φ = 139803160.

The previous prime is 139803151. The next prime is 139803163. The reversal of 139803161 is 161308931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112763161 + 27040000 = 10619^2 + 5200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139803161 is a prime.

Together with 139803163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139803163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69901580 + 69901581.

It is an arithmetic number, because the mean of its divisors is an integer number (69901581).

Almost surely, 2^139803161 is an apocalyptic number.

It is an amenable number.

139803161 is a deficient number, since it is larger than the sum of its proper divisors (1).

139803161 is an equidigital number, since it uses as much as digits as its factorization.

139803161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 139803161 is about 11823.8386744745. The cubic root of 139803161 is about 519.0059423908.

The spelling of 139803161 in words is "one hundred thirty-nine million, eight hundred three thousand, one hundred sixty-one".