47640949 has 2 divisors, whose sum is σ = 47640950. Its totient is φ = 47640948.

The previous prime is 47640877. The next prime is 47640977. The reversal of 47640949 is 94904674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31696900 + 15944049 = 5630^2 + 3993^2 .

It is a cyclic number.

It is not a de Polignac number, because 47640949 - 2⁷ = 47640821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47640449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23820474 + 23820475.

It is an arithmetic number, because the mean of its divisors is an integer number (23820475).

Almost surely, 2^47640949 is an apocalyptic number.

It is an amenable number.

47640949 is a deficient number, since it is larger than the sum of its proper divisors (1).

47640949 is an equidigital number, since it uses as much as digits as its factorization.

47640949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 47640949 is about 6902.2423168127. The cubic root of 47640949 is about 362.5156844581.

The spelling of 47640949 in words is "forty-seven million, six hundred forty thousand, nine hundred forty-nine".