139341947 has 4 divisors (see below), whose sum is σ = 140064120. Its totient is φ = 138619776.

The previous prime is 139341941. The next prime is 139342001. The reversal of 139341947 is 749143931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749143931 = 7643 ⋅98017.

It is a cyclic number.

It is not a de Polignac number, because 139341947 - 2⁶ = 139341883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139341941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360797 + ... + 361182.

It is an arithmetic number, because the mean of its divisors is an integer number (35016030).

Almost surely, 2^139341947 is an apocalyptic number.

139341947 is a deficient number, since it is larger than the sum of its proper divisors (722173).

139341947 is an equidigital number, since it uses as much as digits as its factorization.

139341947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722172.

The product of its digits is 81648, while the sum is 41.

The square root of 139341947 is about 11804.3189977228. The cubic root of 139341947 is about 518.4345759050.

The spelling of 139341947 in words is "one hundred thirty-nine million, three hundred forty-one thousand, nine hundred forty-seven".