47772913 has 4 divisors (see below), whose sum is σ = 48938148. Its totient is φ = 46607680.

The previous prime is 47772911. The next prime is 47772931. The reversal of 47772913 is 31927774.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31927774 = 2 ⋅15963887.

It can be written as a sum of positive squares in 2 ways, for example, as 1151329 + 46621584 = 1073^2 + 6828^2 .

It is a cyclic number.

It is not a de Polignac number, because 47772913 - 2¹ = 47772911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47772911) 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, 582556 + ... + 582637.

It is an arithmetic number, because the mean of its divisors is an integer number (12234537).

Almost surely, 2^47772913 is an apocalyptic number.

It is an amenable number.

47772913 is a deficient number, since it is larger than the sum of its proper divisors (1165235).

47772913 is a wasteful number, since it uses less digits than its factorization.

47772913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165234.

The product of its digits is 74088, while the sum is 40.

The square root of 47772913 is about 6911.7952081930. The cubic root of 47772913 is about 362.8500950702.

The spelling of 47772913 in words is "forty-seven million, seven hundred seventy-two thousand, nine hundred thirteen".