47397208681 has 27 divisors (see below), whose sum is σ = 49935180087. Its totient is φ = 44987387760.

The previous prime is 47397208667. The next prime is 47397208687. The reversal of 47397208681 is 18680279374.

The square root of 47397208681 is 217709.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1541269081 + 45855939600 = 39259^2 + 214140^2 .

It is not a de Polignac number, because 47397208681 - 2⁷ = 47397208553 is a prime.

It is a super-2 number, since 2×47397208681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47397208687) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 571050666 + ... + 571050748.

Almost surely, 2^47397208681 is an apocalyptic number.

47397208681 is the 217709-th square number.

47397208681 is the 108855-th centered octagonal number.

It is an amenable number.

47397208681 is a deficient number, since it is larger than the sum of its proper divisors (2537971406).

47397208681 is an frugal number, since it uses more digits than its factorization.

47397208681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 47397208681 in words is "forty-seven billion, three hundred ninety-seven million, two hundred eight thousand, six hundred eighty-one".