139997047 has 4 divisors (see below), whose sum is σ = 141004360. Its totient is φ = 138989736.

The previous prime is 139997017. The next prime is 139997087. The reversal of 139997047 is 740799931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139997047 - 2²³ = 131608439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139997017) 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, 503448 + ... + 503725.

It is an arithmetic number, because the mean of its divisors is an integer number (35251090).

Almost surely, 2^139997047 is an apocalyptic number.

139997047 is a deficient number, since it is larger than the sum of its proper divisors (1007313).

139997047 is a wasteful number, since it uses less digits than its factorization.

139997047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007312.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 139997047 is about 11832.0347785155. The cubic root of 139997047 is about 519.2457593416.

The spelling of 139997047 in words is "one hundred thirty-nine million, nine hundred ninety-seven thousand, forty-seven".