138967349 has 4 divisors (see below), whose sum is σ = 146281440. Its totient is φ = 131653260.

The previous prime is 138967319. The next prime is 138967369. The reversal of 138967349 is 943769831.

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: 943769831 = 433 ⋅2179607.

It is a cyclic number.

It is not a de Polignac number, because 138967349 - 2¹⁶ = 138901813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138967297 and 138967306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138967319) 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, 3657017 + ... + 3657054.

It is an arithmetic number, because the mean of its divisors is an integer number (36570360).

Almost surely, 2^138967349 is an apocalyptic number.

138967349 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

138967349 is a deficient number, since it is larger than the sum of its proper divisors (7314091).

138967349 is an equidigital number, since it uses as much as digits as its factorization.

138967349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314090.

The product of its digits is 979776, while the sum is 50.

The square root of 138967349 is about 11788.4413303880. The cubic root of 138967349 is about 517.9695834915.

The spelling of 138967349 in words is "one hundred thirty-eight million, nine hundred sixty-seven thousand, three hundred forty-nine".