47408861 has 4 divisors (see below), whose sum is σ = 47423772. Its totient is φ = 47393952.

The previous prime is 47408849. The next prime is 47408899. The reversal of 47408861 is 16880474.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10272025 + 37136836 = 3205^2 + 6094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47408861 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 (47408821) 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, 560 + ... + 9753.

It is an arithmetic number, because the mean of its divisors is an integer number (11855943).

Almost surely, 2^47408861 is an apocalyptic number.

It is an amenable number.

47408861 is a deficient number, since it is larger than the sum of its proper divisors (14911).

47408861 is a wasteful number, since it uses less digits than its factorization.

47408861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14910.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 47408861 is about 6885.4092834050. The cubic root of 47408861 is about 361.9260478953.

The spelling of 47408861 in words is "forty-seven million, four hundred eight thousand, eight hundred sixty-one".