139354247 has 4 divisors (see below), whose sum is σ = 143120616. Its totient is φ = 135587880.

The previous prime is 139354213. The next prime is 139354273. The reversal of 139354247 is 742453931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742453931 = 89 ⋅8342179.

It is a cyclic number.

It is not a de Polignac number, because 139354247 - 2¹⁰ = 139353223 is a prime.

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 139354247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139354277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1883129 + ... + 1883202.

It is an arithmetic number, because the mean of its divisors is an integer number (35780154).

Almost surely, 2^139354247 is an apocalyptic number.

139354247 is a deficient number, since it is larger than the sum of its proper divisors (3766369).

139354247 is an equidigital number, since it uses as much as digits as its factorization.

139354247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3766368.

The product of its digits is 90720, while the sum is 38.

The square root of 139354247 is about 11804.8399819735. The cubic root of 139354247 is about 518.4498298846.

The spelling of 139354247 in words is "one hundred thirty-nine million, three hundred fifty-four thousand, two hundred forty-seven".