47742787 has 4 divisors (see below), whose sum is σ = 49389120. Its totient is φ = 46096456.

The previous prime is 47742769. The next prime is 47742791. The reversal of 47742787 is 78724774.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47742787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47742757) 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, 823123 + ... + 823180.

It is an arithmetic number, because the mean of its divisors is an integer number (12347280).

Almost surely, 2^47742787 is an apocalyptic number.

47742787 is a deficient number, since it is larger than the sum of its proper divisors (1646333).

47742787 is a wasteful number, since it uses less digits than its factorization.

47742787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646332.

The product of its digits is 614656, while the sum is 46.

The square root of 47742787 is about 6909.6155464686. The cubic root of 47742787 is about 362.7738069266.

It can be divided in two parts, 477 and 42787, that added together give a square (43264 = 208²).

The spelling of 47742787 in words is "forty-seven million, seven hundred forty-two thousand, seven hundred eighty-seven".