47642787 has 6 divisors (see below), whose sum is σ = 68817372. Its totient is φ = 31761852.

The previous prime is 47642783. The next prime is 47642797. The reversal of 47642787 is 78724674.

It is not a de Polignac number, because 47642787 - 2² = 47642783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47642783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2646813 + ... + 2646830.

It is an arithmetic number, because the mean of its divisors is an integer number (11469562).

Almost surely, 2^47642787 is an apocalyptic number.

47642787 is a deficient number, since it is larger than the sum of its proper divisors (21174585).

47642787 is a wasteful number, since it uses less digits than its factorization.

47642787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5293649 (or 5293646 counting only the distinct ones).

The product of its digits is 526848, while the sum is 45.

The square root of 47642787 is about 6902.3754606657. The cubic root of 47642787 is about 362.5203463808.

The spelling of 47642787 in words is "forty-seven million, six hundred forty-two thousand, seven hundred eighty-seven".