139291748 has 6 divisors (see below), whose sum is σ = 243760566. Its totient is φ = 69645872.

The previous prime is 139291729. The next prime is 139291759. The reversal of 139291748 is 847192931.

It can be written as a sum of positive squares in only one way, i.e., 104693824 + 34597924 = 10232^2 + 5882^2 .

It is a junction number, because it is equal to n+sod(n) for n = 139291699 and 139291708.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17411465 + ... + 17411472.

It is an arithmetic number, because the mean of its divisors is an integer number (40626761).

Almost surely, 2^139291748 is an apocalyptic number.

It is an amenable number.

139291748 is a deficient number, since it is larger than the sum of its proper divisors (104468818).

139291748 is a wasteful number, since it uses less digits than its factorization.

139291748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34822941 (or 34822939 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 139291748 is about 11802.1925081741. The cubic root of 139291748 is about 518.3723117563.

The spelling of 139291748 in words is "one hundred thirty-nine million, two hundred ninety-one thousand, seven hundred forty-eight".