948646381 has 2 divisors, whose sum is σ = 948646382. Its totient is φ = 948646380.

The previous prime is 948646379. The next prime is 948646399. The reversal of 948646381 is 183646849.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 712409481 + 236236900 = 26691^2 + 15370^2 .

It is an emirp because it is prime and its reverse (183646849) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 948646381 - 2¹ = 948646379 is a prime.

It is a super-2 number, since 2×948646381² = 1799859912368794322, which contains 22 as substring.

Together with 948646379, 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 (948646301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474323190 + 474323191.

It is an arithmetic number, because the mean of its divisors is an integer number (474323191).

Almost surely, 2^948646381 is an apocalyptic number.

It is an amenable number.

948646381 is a deficient number, since it is larger than the sum of its proper divisors (1).

948646381 is an equidigital number, since it uses as much as digits as its factorization.

948646381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 49.

The square root of 948646381 is about 30800.1035874881. The cubic root of 948646381 is about 982.5804481474.

The spelling of 948646381 in words is "nine hundred forty-eight million, six hundred forty-six thousand, three hundred eighty-one".