139898347 has 4 divisors (see below), whose sum is σ = 141340696. Its totient is φ = 138456000.

The previous prime is 139898309. The next prime is 139898359. The reversal of 139898347 is 743898931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 743898931 = 593 ⋅1254467.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139898347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139898294 and 139898303.

It is not an unprimeable number, because it can be changed into a prime (139898047) 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, 721029 + ... + 721222.

It is an arithmetic number, because the mean of its divisors is an integer number (35335174).

Almost surely, 2^139898347 is an apocalyptic number.

139898347 is a deficient number, since it is larger than the sum of its proper divisors (1442349).

139898347 is an equidigital number, since it uses as much as digits as its factorization.

139898347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442348.

The product of its digits is 1306368, while the sum is 52.

The square root of 139898347 is about 11827.8631628879. The cubic root of 139898347 is about 519.1237053265.

The spelling of 139898347 in words is "one hundred thirty-nine million, eight hundred ninety-eight thousand, three hundred forty-seven".