945863881 has 2 divisors, whose sum is σ = 945863882. Its totient is φ = 945863880.

The previous prime is 945863839. The next prime is 945863903. The reversal of 945863881 is 188368549.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 690375625 + 255488256 = 26275^2 + 15984^2 .

It is a cyclic number.

It is not a de Polignac number, because 945863881 - 2¹³ = 945855689 is a prime.

It is a super-2 number, since 2×945863881² = 1789316962760764322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (945863801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472931940 + 472931941.

It is an arithmetic number, because the mean of its divisors is an integer number (472931941).

Almost surely, 2^945863881 is an apocalyptic number.

It is an amenable number.

945863881 is a deficient number, since it is larger than the sum of its proper divisors (1).

945863881 is an equidigital number, since it uses as much as digits as its factorization.

945863881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 52.

The square root of 945863881 is about 30754.9001136404. The cubic root of 945863881 is about 981.6188297117.

The spelling of 945863881 in words is "nine hundred forty-five million, eight hundred sixty-three thousand, eight hundred eighty-one".