47678993 has 2 divisors, whose sum is σ = 47678994. Its totient is φ = 47678992.

The previous prime is 47678971. The next prime is 47679029. The reversal of 47678993 is 39987674.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34668544 + 13010449 = 5888^2 + 3607^2 .

It is a cyclic number.

It is not a de Polignac number, because 47678993 - 2¹⁶ = 47613457 is a prime.

It is not a weakly prime, because it can be changed into another prime (47678963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23839496 + 23839497.

It is an arithmetic number, because the mean of its divisors is an integer number (23839497).

Almost surely, 2^47678993 is an apocalyptic number.

It is an amenable number.

47678993 is a deficient number, since it is larger than the sum of its proper divisors (1).

47678993 is an equidigital number, since it uses as much as digits as its factorization.

47678993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 53.

The square root of 47678993 is about 6904.9976828381. The cubic root of 47678993 is about 362.6121552289.

The spelling of 47678993 in words is "forty-seven million, six hundred seventy-eight thousand, nine hundred ninety-three".