47021747 has 4 divisors (see below), whose sum is σ = 48115320. Its totient is φ = 45928176.

The previous prime is 47021719. The next prime is 47021749. The reversal of 47021747 is 74712074.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74712074 = 2 ⋅37356037.

It is a cyclic number.

It is not a de Polignac number, because 47021747 - 2²⁰ = 45973171 is a prime.

It is a super-2 number, since 2×47021747² = 4422089381864018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47021749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546722 + ... + 546807.

It is an arithmetic number, because the mean of its divisors is an integer number (12028830).

Almost surely, 2^47021747 is an apocalyptic number.

47021747 is a deficient number, since it is larger than the sum of its proper divisors (1093573).

47021747 is a wasteful number, since it uses less digits than its factorization.

47021747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093572.

The product of its (nonzero) digits is 10976, while the sum is 32.

The square root of 47021747 is about 6857.2404799599. The cubic root of 47021747 is about 360.9382598149.

The spelling of 47021747 in words is "forty-seven million, twenty-one thousand, seven hundred forty-seven".