139698780169 has 9 divisors (see below), whose sum is σ = 151276721799. Its totient is φ = 128948235000.

The previous prime is 139698780127. The next prime is 139698780223. The reversal of 139698780169 is 961087896931.

The square root of 139698780169 is 373763.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 20665500025 + 119033280144 = 143755^2 + 345012^2 .

It is not a de Polignac number, because 139698780169 - 2¹⁵ = 139698747401 is a prime.

It is a super-2 number, since 2×139698780169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139698780469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4844544 + ... + 4873294.

Almost surely, 2^139698780169 is an apocalyptic number.

139698780169 is the 373763-rd square number.

139698780169 is the 186882-nd centered octagonal number.

It is an amenable number.

139698780169 is a deficient number, since it is larger than the sum of its proper divisors (11577941630).

139698780169 is an frugal number, since it uses more digits than its factorization.

139698780169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57528 (or 28764 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 67.

The spelling of 139698780169 in words is "one hundred thirty-nine billion, six hundred ninety-eight million, seven hundred eighty thousand, one hundred sixty-nine".