47881689 has 4 divisors (see below), whose sum is σ = 63842256. Its totient is φ = 31921124.

The previous prime is 47881657. The next prime is 47881693. The reversal of 47881689 is 98618874.

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 47881689 - 2⁵ = 47881657 is a prime.

It is a super-2 number, since 2×47881689² = 4585312282985442, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47880689) 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, 7980279 + ... + 7980284.

It is an arithmetic number, because the mean of its divisors is an integer number (15960564).

Almost surely, 2^47881689 is an apocalyptic number.

It is an amenable number.

47881689 is a deficient number, since it is larger than the sum of its proper divisors (15960567).

47881689 is a wasteful number, since it uses less digits than its factorization.

47881689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15960566.

The product of its digits is 774144, while the sum is 51.

The square root of 47881689 is about 6919.6596014544. The cubic root of 47881689 is about 363.1252821364.

The spelling of 47881689 in words is "forty-seven million, eight hundred eighty-one thousand, six hundred eighty-nine".