139018937509 has 8 divisors (see below), whose sum is σ = 139393291392. Its totient is φ = 138644824320.

The previous prime is 139018937507. The next prime is 139018937527. The reversal of 139018937509 is 905739810931.

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 139018937509 - 2¹ = 139018937507 is a prime.

It is a super-2 number, since 2×139018937509² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139018937509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139018937501) 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, 1127962 + ... + 1245124.

It is an arithmetic number, because the mean of its divisors is an integer number (17424161424).

Almost surely, 2^139018937509 is an apocalyptic number.

It is an amenable number.

139018937509 is a deficient number, since it is larger than the sum of its proper divisors (374353883).

139018937509 is a wasteful number, since it uses less digits than its factorization.

139018937509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120347.

The product of its (nonzero) digits is 1837080, while the sum is 55.

The spelling of 139018937509 in words is "one hundred thirty-nine billion, eighteen million, nine hundred thirty-seven thousand, five hundred nine".