47651447 has 2 divisors, whose sum is σ = 47651448. Its totient is φ = 47651446.

The previous prime is 47651341. The next prime is 47651453. The reversal of 47651447 is 74415674.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47651447 - 2¹² = 47647351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47651447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47621447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23825723 + 23825724.

It is an arithmetic number, because the mean of its divisors is an integer number (23825724).

Almost surely, 2^47651447 is an apocalyptic number.

47651447 is a deficient number, since it is larger than the sum of its proper divisors (1).

47651447 is an equidigital number, since it uses as much as digits as its factorization.

47651447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 38.

The square root of 47651447 is about 6903.0027524259. The cubic root of 47651447 is about 362.5423100833.

Subtracting from 47651447 its sum of digits (38), we obtain a square (47651409 = 6903²).

The spelling of 47651447 in words is "forty-seven million, six hundred fifty-one thousand, four hundred forty-seven".