47761881 has 4 divisors (see below), whose sum is σ = 63682512. Its totient is φ = 31841252.

The previous prime is 47761873. The next prime is 47761897. The reversal of 47761881 is 18816774.

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 47761881 - 2³ = 47761873 is a prime.

It is a super-2 number, since 2×47761881² = 4562394553316322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47761081) 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, 7960311 + ... + 7960316.

It is an arithmetic number, because the mean of its divisors is an integer number (15920628).

Almost surely, 2^47761881 is an apocalyptic number.

It is an amenable number.

47761881 is a deficient number, since it is larger than the sum of its proper divisors (15920631).

47761881 is a wasteful number, since it uses less digits than its factorization.

47761881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15920630.

The product of its digits is 75264, while the sum is 42.

The square root of 47761881 is about 6910.9971060622. The cubic root of 47761881 is about 362.8221624325.

The spelling of 47761881 in words is "forty-seven million, seven hundred sixty-one thousand, eight hundred eighty-one".