139164426197 has 2 divisors, whose sum is σ = 139164426198. Its totient is φ = 139164426196.

The previous prime is 139164426131. The next prime is 139164426241. The reversal of 139164426197 is 791624461931.

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., 123857540356 + 15306885841 = 351934^2 + 123721^2 .

It is a cyclic number.

It is not a de Polignac number, because 139164426197 - 2⁸ = 139164425941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139161426197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69582213098 + 69582213099.

It is an arithmetic number, because the mean of its divisors is an integer number (69582213099).

Almost surely, 2^139164426197 is an apocalyptic number.

It is an amenable number.

139164426197 is a deficient number, since it is larger than the sum of its proper divisors (1).

139164426197 is an equidigital number, since it uses as much as digits as its factorization.

139164426197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The spelling of 139164426197 in words is "one hundred thirty-nine billion, one hundred sixty-four million, four hundred twenty-six thousand, one hundred ninety-seven".