47993857 has 2 divisors, whose sum is σ = 47993858. Its totient is φ = 47993856.

The previous prime is 47993819. The next prime is 47993861. The reversal of 47993857 is 75839974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41460721 + 6533136 = 6439^2 + 2556^2 .

It is a cyclic number.

It is not a de Polignac number, because 47993857 - 2²³ = 39605249 is a prime.

It is not a weakly prime, because it can be changed into another prime (47993807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23996928 + 23996929.

It is an arithmetic number, because the mean of its divisors is an integer number (23996929).

Almost surely, 2^47993857 is an apocalyptic number.

It is an amenable number.

47993857 is a deficient number, since it is larger than the sum of its proper divisors (1).

47993857 is an equidigital number, since it uses as much as digits as its factorization.

47993857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 52.

The square root of 47993857 is about 6927.7598832523. The cubic root of 47993857 is about 363.4086143331.

The spelling of 47993857 in words is "forty-seven million, nine hundred ninety-three thousand, eight hundred fifty-seven".