139073642009 has 8 divisors (see below), whose sum is σ = 142619074920. Its totient is φ = 135535513600.

The previous prime is 139073641991. The next prime is 139073642083. The reversal of 139073642009 is 900246370931.

It can be written as a sum of positive squares in 4 ways, for example, as 213072409 + 138860569600 = 14597^2 + 372640^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139073642009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139073642909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1787552 + ... + 1863729.

It is an arithmetic number, because the mean of its divisors is an integer number (17827384365).

Almost surely, 2^139073642009 is an apocalyptic number.

It is an amenable number.

139073642009 is a deficient number, since it is larger than the sum of its proper divisors (3545432911).

139073642009 is an equidigital number, since it uses as much as digits as its factorization.

139073642009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652251.

The product of its (nonzero) digits is 244944, while the sum is 44.

The spelling of 139073642009 in words is "one hundred thirty-nine billion, seventy-three million, six hundred forty-two thousand, nine".