47345257 has 2 divisors, whose sum is σ = 47345258. Its totient is φ = 47345256.

The previous prime is 47345251. The next prime is 47345261. The reversal of 47345257 is 75254374.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44036496 + 3308761 = 6636^2 + 1819^2 .

It is a cyclic number.

It is not a de Polignac number, because 47345257 - 2¹¹ = 47343209 is a prime.

It is not a weakly prime, because it can be changed into another prime (47345251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23672628 + 23672629.

It is an arithmetic number, because the mean of its divisors is an integer number (23672629).

Almost surely, 2^47345257 is an apocalyptic number.

It is an amenable number.

47345257 is a deficient number, since it is larger than the sum of its proper divisors (1).

47345257 is an equidigital number, since it uses as much as digits as its factorization.

47345257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 37.

The square root of 47345257 is about 6880.7889809236. The cubic root of 47345257 is about 361.7641214389.

The spelling of 47345257 in words is "forty-seven million, three hundred forty-five thousand, two hundred fifty-seven".