139471376069 has 2 divisors, whose sum is σ = 139471376070. Its totient is φ = 139471376068.

The previous prime is 139471376021. The next prime is 139471376071. The reversal of 139471376069 is 960673174931.

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., 73244927044 + 66226449025 = 270638^2 + 257345^2 .

It is a cyclic number.

It is not a de Polignac number, because 139471376069 - 2³⁶ = 70751899333 is a prime.

It is a super-2 number, since 2×139471376069² (a number of 23 digits) contains 22 as substring.

Together with 139471376071, 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 (139471376669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69735688034 + 69735688035.

It is an arithmetic number, because the mean of its divisors is an integer number (69735688035).

Almost surely, 2^139471376069 is an apocalyptic number.

It is an amenable number.

139471376069 is a deficient number, since it is larger than the sum of its proper divisors (1).

139471376069 is an equidigital number, since it uses as much as digits as its factorization.

139471376069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5143824, while the sum is 56.

The spelling of 139471376069 in words is "one hundred thirty-nine billion, four hundred seventy-one million, three hundred seventy-six thousand, sixty-nine".