47338981 has 2 divisors, whose sum is σ = 47338982. Its totient is φ = 47338980.

The previous prime is 47338979. The next prime is 47338987. The reversal of 47338981 is 18983374.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39125025 + 8213956 = 6255^2 + 2866^2 .

It is a cyclic number.

It is not a de Polignac number, because 47338981 - 2¹ = 47338979 is a prime.

It is a super-2 number, since 2×47338981² = 4481958244236722, which contains 22 as substring.

Together with 47338979, 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 (47338987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23669490 + 23669491.

It is an arithmetic number, because the mean of its divisors is an integer number (23669491).

Almost surely, 2^47338981 is an apocalyptic number.

It is an amenable number.

47338981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47338981 is an equidigital number, since it uses as much as digits as its factorization.

47338981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 47338981 is about 6880.3329134570. The cubic root of 47338981 is about 361.7481358041.

The spelling of 47338981 in words is "forty-seven million, three hundred thirty-eight thousand, nine hundred eighty-one".