47421547 has 2 divisors, whose sum is σ = 47421548. Its totient is φ = 47421546.

The previous prime is 47421541. The next prime is 47421557. The reversal of 47421547 is 74512474.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47421547 - 2¹¹ = 47419499 is a prime.

It is not a weakly prime, because it can be changed into another prime (47421541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23710773 + 23710774.

It is an arithmetic number, because the mean of its divisors is an integer number (23710774).

Almost surely, 2^47421547 is an apocalyptic number.

47421547 is a deficient number, since it is larger than the sum of its proper divisors (1).

47421547 is an equidigital number, since it uses as much as digits as its factorization.

47421547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31360, while the sum is 34.

The square root of 47421547 is about 6886.3304451645. The cubic root of 47421547 is about 361.9583272644.

The spelling of 47421547 in words is "forty-seven million, four hundred twenty-one thousand, five hundred forty-seven".