47873981 has 2 divisors, whose sum is σ = 47873982. Its totient is φ = 47873980.

The previous prime is 47873941. The next prime is 47874011. The reversal of 47873981 is 18937874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47045881 + 828100 = 6859^2 + 910^2 .

It is a cyclic number.

It is not a de Polignac number, because 47873981 - 2¹⁴ = 47857597 is a prime.

It is a super-2 number, since 2×47873981² = 4583836113576722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47873941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23936990 + 23936991.

It is an arithmetic number, because the mean of its divisors is an integer number (23936991).

Almost surely, 2^47873981 is an apocalyptic number.

It is an amenable number.

47873981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47873981 is an equidigital number, since it uses as much as digits as its factorization.

47873981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 47.

The square root of 47873981 is about 6919.1026152240. The cubic root of 47873981 is about 363.1057957737.

The spelling of 47873981 in words is "forty-seven million, eight hundred seventy-three thousand, nine hundred eighty-one".