47640547 has 2 divisors, whose sum is σ = 47640548. Its totient is φ = 47640546.

The previous prime is 47640539. The next prime is 47640559. The reversal of 47640547 is 74504674.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47640547 - 2³ = 47640539 is a prime.

It is not a weakly prime, because it can be changed into another prime (47640577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23820273 + 23820274.

It is an arithmetic number, because the mean of its divisors is an integer number (23820274).

Almost surely, 2^47640547 is an apocalyptic number.

47640547 is a deficient number, since it is larger than the sum of its proper divisors (1).

47640547 is an equidigital number, since it uses as much as digits as its factorization.

47640547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 47640547 is about 6902.2131957800. The cubic root of 47640547 is about 362.5146648051.

The spelling of 47640547 in words is "forty-seven million, six hundred forty thousand, five hundred forty-seven".