945053821 has 2 divisors, whose sum is σ = 945053822. Its totient is φ = 945053820.

The previous prime is 945053819. The next prime is 945053833. The reversal of 945053821 is 128350549.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 944025625 + 1028196 = 30725^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 945053821 - 2¹ = 945053819 is a prime.

Together with 945053819, 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 (945059821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472526910 + 472526911.

It is an arithmetic number, because the mean of its divisors is an integer number (472526911).

Almost surely, 2^945053821 is an apocalyptic number.

It is an amenable number.

945053821 is a deficient number, since it is larger than the sum of its proper divisors (1).

945053821 is an equidigital number, since it uses as much as digits as its factorization.

945053821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 945053821 is about 30741.7276840453. The cubic root of 945053821 is about 981.3385225505.

The spelling of 945053821 in words is "nine hundred forty-five million, fifty-three thousand, eight hundred twenty-one".