138513967349 has 4 divisors (see below), whose sum is σ = 140581340064. Its totient is φ = 136446594636.

The previous prime is 138513967309. The next prime is 138513967369. The reversal of 138513967349 is 943769315831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 943769315831 = 301243 ⋅3132917.

It is a cyclic number.

It is not a de Polignac number, because 138513967349 - 2⁸ = 138513967093 is a prime.

It is a super-2 number, since 2×138513967349² (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 (138513967309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1033686257 + ... + 1033686390.

It is an arithmetic number, because the mean of its divisors is an integer number (35145335016).

Almost surely, 2^138513967349 is an apocalyptic number.

It is an amenable number.

138513967349 is a deficient number, since it is larger than the sum of its proper divisors (2067372715).

138513967349 is an equidigital number, since it uses as much as digits as its factorization.

138513967349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067372714.

The product of its digits is 14696640, while the sum is 59.

The spelling of 138513967349 in words is "one hundred thirty-eight billion, five hundred thirteen million, nine hundred sixty-seven thousand, three hundred forty-nine".