47957381 has 2 divisors, whose sum is σ = 47957382. Its totient is φ = 47957380.

The previous prime is 47957347. The next prime is 47957389. The reversal of 47957381 is 18375974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33744481 + 14212900 = 5809^2 + 3770^2 .

It is a cyclic number.

It is not a de Polignac number, because 47957381 - 2¹⁸ = 47695237 is a prime.

It is a super-2 number, since 2×47957381² = 4599820784758322, which contains 22 as substring.

It is equal to p_2885759 and since 47957381 and 2885759 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47957389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23978690 + 23978691.

It is an arithmetic number, because the mean of its divisors is an integer number (23978691).

Almost surely, 2^47957381 is an apocalyptic number.

It is an amenable number.

47957381 is a deficient number, since it is larger than the sum of its proper divisors (1).

47957381 is an equidigital number, since it uses as much as digits as its factorization.

47957381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 47957381 is about 6925.1267858430. The cubic root of 47957381 is about 363.3165257962.

The spelling of 47957381 in words is "forty-seven million, nine hundred fifty-seven thousand, three hundred eighty-one".