47477761 has 4 divisors (see below), whose sum is σ = 47824452. Its totient is φ = 47131072.

The previous prime is 47477707. The next prime is 47477767. The reversal of 47477761 is 16777474.

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 30305025 + 17172736 = 5505^2 + 4144^2 .

It is a cyclic number.

It is not a de Polignac number, because 47477761 - 2⁹ = 47477249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47477767) 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, 173140 + ... + 173413.

It is an arithmetic number, because the mean of its divisors is an integer number (11956113).

Almost surely, 2^47477761 is an apocalyptic number.

It is an amenable number.

47477761 is a deficient number, since it is larger than the sum of its proper divisors (346691).

47477761 is a wasteful number, since it uses less digits than its factorization.

47477761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346690.

The product of its digits is 230496, while the sum is 43.

The square root of 47477761 is about 6890.4108005256. The cubic root of 47477761 is about 362.1012938558.

The spelling of 47477761 in words is "forty-seven million, four hundred seventy-seven thousand, seven hundred sixty-one".