139691515069 has 4 divisors (see below), whose sum is σ = 139692461980. Its totient is φ = 139690568160.

The previous prime is 139691515049. The next prime is 139691515087. The reversal of 139691515069 is 960515196931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 33505472025 + 106186043044 = 183045^2 + 325862^2 .

It is a cyclic number.

It is not a de Polignac number, because 139691515069 - 2⁵ = 139691515037 is a prime.

It is a super-2 number, since 2×139691515069² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139691515009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199224 + ... + 564865.

It is an arithmetic number, because the mean of its divisors is an integer number (34923115495).

Almost surely, 2^139691515069 is an apocalyptic number.

It is an amenable number.

139691515069 is a deficient number, since it is larger than the sum of its proper divisors (946911).

139691515069 is an equidigital number, since it uses as much as digits as its factorization.

139691515069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946910.

The product of its (nonzero) digits is 1968300, while the sum is 55.

The spelling of 139691515069 in words is "one hundred thirty-nine billion, six hundred ninety-one million, five hundred fifteen thousand, sixty-nine".