9139456947 has 4 divisors (see below), whose sum is σ = 12185942600. Its totient is φ = 6092971296.

The previous prime is 9139456933. The next prime is 9139456951. The reversal of 9139456947 is 7496549319.

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

It is not a de Polignac number, because 9139456947 - 2¹⁸ = 9139194803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9139456967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1523242822 + ... + 1523242827.

It is an arithmetic number, because the mean of its divisors is an integer number (3046485650).

Almost surely, 2^9139456947 is an apocalyptic number.

9139456947 is a deficient number, since it is larger than the sum of its proper divisors (3046485653).

9139456947 is a wasteful number, since it uses less digits than its factorization.

9139456947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046485652.

The product of its digits is 7348320, while the sum is 57.

The square root of 9139456947 is about 95600.5070436344. The cubic root of 9139456947 is about 2090.7725864060.

The spelling of 9139456947 in words is "nine billion, one hundred thirty-nine million, four hundred fifty-six thousand, nine hundred forty-seven".