47397213 has 12 divisors (see below), whose sum is σ = 68522428. Its totient is φ = 31570560.

The previous prime is 47397209. The next prime is 47397247. The reversal of 47397213 is 31279374.

It can be written as a sum of positive squares in 2 ways, for example, as 38415204 + 8982009 = 6198^2 + 2997^2 .

It is not a de Polignac number, because 47397213 - 2² = 47397209 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 (47397263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18231 + ... + 20667.

Almost surely, 2^47397213 is an apocalyptic number.

It is an amenable number.

47397213 is a deficient number, since it is larger than the sum of its proper divisors (21125215).

47397213 is a wasteful number, since it uses less digits than its factorization.

47397213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4604 (or 4601 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 47397213 is about 6884.5633848487. The cubic root of 47397213 is about 361.8964046329.

The spelling of 47397213 in words is "forty-seven million, three hundred ninety-seven thousand, two hundred thirteen".