47497861 has 4 divisors (see below), whose sum is σ = 47513452. Its totient is φ = 47482272.

The previous prime is 47497823. The next prime is 47497883. The reversal of 47497861 is 16879474.

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 5377761 + 42120100 = 2319^2 + 6490^2 .

It is a cyclic number.

It is not a de Polignac number, because 47497861 - 2⁷ = 47497733 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 (47497561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566 + ... + 9871.

It is an arithmetic number, because the mean of its divisors is an integer number (11878363).

Almost surely, 2^47497861 is an apocalyptic number.

It is an amenable number.

47497861 is a deficient number, since it is larger than the sum of its proper divisors (15591).

47497861 is a wasteful number, since it uses less digits than its factorization.

47497861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15590.

The product of its digits is 338688, while the sum is 46.

The square root of 47497861 is about 6891.8691949282. The cubic root of 47497861 is about 362.1523859110.

The spelling of 47497861 in words is "forty-seven million, four hundred ninety-seven thousand, eight hundred sixty-one".