47279639 has 4 divisors (see below), whose sum is σ = 51577800. Its totient is φ = 42981480.

The previous prime is 47279633. The next prime is 47279653. The reversal of 47279639 is 93697274.

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

It is a cyclic number.

It is not a de Polignac number, because 47279639 - 2⁴ = 47279623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47279593 and 47279602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47279633) 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, 2149064 + ... + 2149085.

It is an arithmetic number, because the mean of its divisors is an integer number (12894450).

Almost surely, 2^47279639 is an apocalyptic number.

47279639 is a deficient number, since it is larger than the sum of its proper divisors (4298161).

47279639 is a wasteful number, since it uses less digits than its factorization.

47279639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4298160.

The product of its digits is 571536, while the sum is 47.

The square root of 47279639 is about 6876.0191244644. The cubic root of 47279639 is about 361.5969155790.

The spelling of 47279639 in words is "forty-seven million, two hundred seventy-nine thousand, six hundred thirty-nine".