47299981 has 2 divisors, whose sum is σ = 47299982. Its totient is φ = 47299980.

The previous prime is 47299979. The next prime is 47299991. The reversal of 47299981 is 18999274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39262756 + 8037225 = 6266^2 + 2835^2 .

It is a cyclic number.

It is not a de Polignac number, because 47299981 - 2¹ = 47299979 is a prime.

It is a super-2 number, since 2×47299981² = 4474576405200722, which contains 22 as substring.

Together with 47299979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47299921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23649990 + 23649991.

It is an arithmetic number, because the mean of its divisors is an integer number (23649991).

Almost surely, 2^47299981 is an apocalyptic number.

It is an amenable number.

47299981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47299981 is an equidigital number, since it uses as much as digits as its factorization.

47299981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The square root of 47299981 is about 6877.4981643036. The cubic root of 47299981 is about 361.6487670028.

The spelling of 47299981 in words is "forty-seven million, two hundred ninety-nine thousand, nine hundred eighty-one".