139543747 has 4 divisors (see below), whose sum is σ = 159478576. Its totient is φ = 119608920.

The previous prime is 139543739. The next prime is 139543751. The reversal of 139543747 is 747345931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747345931 = 379 ⋅1971889.

It is a cyclic number.

It is not a de Polignac number, because 139543747 - 2³ = 139543739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139243747) 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, 9967404 + ... + 9967417.

It is an arithmetic number, because the mean of its divisors is an integer number (39869644).

Almost surely, 2^139543747 is an apocalyptic number.

139543747 is a deficient number, since it is larger than the sum of its proper divisors (19934829).

139543747 is an equidigital number, since it uses as much as digits as its factorization.

139543747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19934828.

The product of its digits is 317520, while the sum is 43.

The square root of 139543747 is about 11812.8636240329. The cubic root of 139543747 is about 518.6847270270.

The spelling of 139543747 in words is "one hundred thirty-nine million, five hundred forty-three thousand, seven hundred forty-seven".