47978057 has 2 divisors, whose sum is σ = 47978058. Its totient is φ = 47978056.

The previous prime is 47978017. The next prime is 47978083. The reversal of 47978057 is 75087974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43771456 + 4206601 = 6616^2 + 2051^2 .

It is a cyclic number.

It is not a de Polignac number, because 47978057 - 2²⁰ = 46929481 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47978017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23989028 + 23989029.

It is an arithmetic number, because the mean of its divisors is an integer number (23989029).

Almost surely, 2^47978057 is an apocalyptic number.

It is an amenable number.

47978057 is a deficient number, since it is larger than the sum of its proper divisors (1).

47978057 is an equidigital number, since it uses as much as digits as its factorization.

47978057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 493920, while the sum is 47.

The square root of 47978057 is about 6926.6194496305. The cubic root of 47978057 is about 363.3687308516.

The spelling of 47978057 in words is "forty-seven million, nine hundred seventy-eight thousand, fifty-seven".