47207681 has 4 divisors (see below), whose sum is σ = 47666112. Its totient is φ = 46749252.

The previous prime is 47207653. The next prime is 47207689. The reversal of 47207681 is 18670274.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47207681 - 2¹⁰ = 47206657 is a prime.

It is a super-2 number, since 2×47207681² = 4457130290795522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47207689) 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, 229061 + ... + 229266.

It is an arithmetic number, because the mean of its divisors is an integer number (11916528).

Almost surely, 2^47207681 is an apocalyptic number.

It is an amenable number.

47207681 is a deficient number, since it is larger than the sum of its proper divisors (458431).

47207681 is a wasteful number, since it uses less digits than its factorization.

47207681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458430.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 47207681 is about 6870.7845985739. The cubic root of 47207681 is about 361.4133763714.

The spelling of 47207681 in words is "forty-seven million, two hundred seven thousand, six hundred eighty-one".