945037813 has 2 divisors, whose sum is σ = 945037814. Its totient is φ = 945037812.

The previous prime is 945037811. The next prime is 945037829. The reversal of 945037813 is 318730549.

945037813 = 21737² + 21738².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 472540644 + 472497169 = 21738^2 + 21737^2 .

It is an emirp because it is prime and its reverse (318730549) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 945037813 - 2¹ = 945037811 is a prime.

Together with 945037811, 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 (945037811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472518906 + 472518907.

It is an arithmetic number, because the mean of its divisors is an integer number (472518907).

Almost surely, 2^945037813 is an apocalyptic number.

945037813 is the 21738-th centered square number.

It is an amenable number.

945037813 is a deficient number, since it is larger than the sum of its proper divisors (1).

945037813 is an equidigital number, since it uses as much as digits as its factorization.

945037813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 945037813 is about 30741.4673202175. The cubic root of 945037813 is about 981.3329816471.

The spelling of 945037813 in words is "nine hundred forty-five million, thirty-seven thousand, eight hundred thirteen".