47831761 has 4 divisors (see below), whose sum is σ = 50645412. Its totient is φ = 45018112.

The previous prime is 47831723. The next prime is 47831803. The reversal of 47831761 is 16713874.

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 14017536 + 33814225 = 3744^2 + 5815^2 .

It is a cyclic number.

It is not a de Polignac number, because 47831761 - 2⁹ = 47831249 is a prime.

It is a super-2 number, since 2×47831761² = 4575754720722242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47831761.

It is not an unprimeable number, because it can be changed into a prime (47831561) 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, 1406800 + ... + 1406833.

It is an arithmetic number, because the mean of its divisors is an integer number (12661353).

Almost surely, 2^47831761 is an apocalyptic number.

It is an amenable number.

47831761 is a deficient number, since it is larger than the sum of its proper divisors (2813651).

47831761 is a wasteful number, since it uses less digits than its factorization.

47831761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813650.

The product of its digits is 28224, while the sum is 37.

The square root of 47831761 is about 6916.0509685803. The cubic root of 47831761 is about 362.9990235411. Note that the first 3 decimals are identical.

The spelling of 47831761 in words is "forty-seven million, eight hundred thirty-one thousand, seven hundred sixty-one".