47420279 has 2 divisors, whose sum is σ = 47420280. Its totient is φ = 47420278.

The previous prime is 47420251. The next prime is 47420287. The reversal of 47420279 is 97202474.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47420279 - 2¹² = 47416183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47420209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23710139 + 23710140.

It is an arithmetic number, because the mean of its divisors is an integer number (23710140).

Almost surely, 2^47420279 is an apocalyptic number.

47420279 is a deficient number, since it is larger than the sum of its proper divisors (1).

47420279 is an equidigital number, since it uses as much as digits as its factorization.

47420279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 47420279 is about 6886.2383780987. The cubic root of 47420279 is about 361.9551011131.

The spelling of 47420279 in words is "forty-seven million, four hundred twenty thousand, two hundred seventy-nine".