139497481309 has 8 divisors (see below), whose sum is σ = 145579328640. Its totient is φ = 133417028976.

The previous prime is 139497481283. The next prime is 139497481327. The reversal of 139497481309 is 903184794931.

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

It is a cyclic number.

It is not a de Polignac number, because 139497481309 - 2³³ = 130907546717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139497487309) 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, 141774 + ... + 546895.

It is an arithmetic number, because the mean of its divisors is an integer number (18197416080).

Almost surely, 2^139497481309 is an apocalyptic number.

It is an amenable number.

139497481309 is a deficient number, since it is larger than the sum of its proper divisors (6081847331).

139497481309 is an equidigital number, since it uses as much as digits as its factorization.

139497481309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697499.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 139497481309 in words is "one hundred thirty-nine billion, four hundred ninety-seven million, four hundred eighty-one thousand, three hundred nine".