47221679 has 2 divisors, whose sum is σ = 47221680. Its totient is φ = 47221678.

The previous prime is 47221673. The next prime is 47221687. The reversal of 47221679 is 97612274.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47221679 - 2²⁰ = 46173103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47221673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23610839 + 23610840.

It is an arithmetic number, because the mean of its divisors is an integer number (23610840).

Almost surely, 2^47221679 is an apocalyptic number.

47221679 is a deficient number, since it is larger than the sum of its proper divisors (1).

47221679 is an equidigital number, since it uses as much as digits as its factorization.

47221679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 47221679 is about 6871.8031840267. The cubic root of 47221679 is about 361.4490948843.

The spelling of 47221679 in words is "forty-seven million, two hundred twenty-one thousand, six hundred seventy-nine".