47090257 has 2 divisors, whose sum is σ = 47090258. Its totient is φ = 47090256.

The previous prime is 47090249. The next prime is 47090273. The reversal of 47090257 is 75209074.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25644096 + 21446161 = 5064^2 + 4631^2 .

It is a cyclic number.

It is not a de Polignac number, because 47090257 - 2³ = 47090249 is a prime.

It is not a weakly prime, because it can be changed into another prime (47090297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23545128 + 23545129.

It is an arithmetic number, because the mean of its divisors is an integer number (23545129).

Almost surely, 2^47090257 is an apocalyptic number.

It is an amenable number.

47090257 is a deficient number, since it is larger than the sum of its proper divisors (1).

47090257 is an equidigital number, since it uses as much as digits as its factorization.

47090257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 47090257 is about 6862.2341114246. The cubic root of 47090257 is about 361.1134686780.

The spelling of 47090257 in words is "forty-seven million, ninety thousand, two hundred fifty-seven".