139392747 has 24 divisors (see below), whose sum is σ = 220399088. Its totient is φ = 84369600.

The previous prime is 139392739. The next prime is 139392749. The reversal of 139392747 is 747293931.

It is not a de Polignac number, because 139392747 - 2³ = 139392739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139392749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2629 + ... + 16902.

Almost surely, 2^139392747 is an apocalyptic number.

139392747 is a deficient number, since it is larger than the sum of its proper divisors (81006341).

139392747 is a wasteful number, since it uses less digits than its factorization.

139392747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19611 (or 19608 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 139392747 is about 11806.4705564364. The cubic root of 139392747 is about 518.4975702800.

The spelling of 139392747 in words is "one hundred thirty-nine million, three hundred ninety-two thousand, seven hundred forty-seven".