139073722217 has 2 divisors, whose sum is σ = 139073722218. Its totient is φ = 139073722216.

The previous prime is 139073722181. The next prime is 139073722231. The reversal of 139073722217 is 712227370931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116213491801 + 22860230416 = 340901^2 + 151196^2 .

It is a cyclic number.

It is not a de Polignac number, because 139073722217 - 2⁸ = 139073721961 is a prime.

It is a super-2 number, since 2×139073722217² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139073722517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69536861108 + 69536861109.

It is an arithmetic number, because the mean of its divisors is an integer number (69536861109).

Almost surely, 2^139073722217 is an apocalyptic number.

It is an amenable number.

139073722217 is a deficient number, since it is larger than the sum of its proper divisors (1).

139073722217 is an equidigital number, since it uses as much as digits as its factorization.

139073722217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 44.

The spelling of 139073722217 in words is "one hundred thirty-nine billion, seventy-three million, seven hundred twenty-two thousand, two hundred seventeen".