948890861 has 2 divisors, whose sum is σ = 948890862. Its totient is φ = 948890860.

The previous prime is 948890851. The next prime is 948890881. The reversal of 948890861 is 168098849.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948024100 + 866761 = 30790^2 + 931^2 .

It is a cyclic number.

It is not a de Polignac number, because 948890861 - 2¹⁸ = 948628717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (948890821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474445430 + 474445431.

It is an arithmetic number, because the mean of its divisors is an integer number (474445431).

Almost surely, 2^948890861 is an apocalyptic number.

It is an amenable number.

948890861 is a deficient number, since it is larger than the sum of its proper divisors (1).

948890861 is an equidigital number, since it uses as much as digits as its factorization.

948890861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 948890861 is about 30804.0721496363. The cubic root of 948890861 is about 982.6648493319.

The spelling of 948890861 in words is "nine hundred forty-eight million, eight hundred ninety thousand, eight hundred sixty-one".