945994081 has 4 divisors (see below), whose sum is σ = 946088964. Its totient is φ = 945899200.

The previous prime is 945994073. The next prime is 945994139. The reversal of 945994081 is 180499549.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 117072400 + 828921681 = 10820^2 + 28791^2 .

It is a cyclic number.

It is not a de Polignac number, because 945994081 - 2³ = 945994073 is a prime.

It is a super-2 number, since 2×945994081² = 1789809602574069122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (945994031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30460 + ... + 53101.

It is an arithmetic number, because the mean of its divisors is an integer number (236522241).

Almost surely, 2^945994081 is an apocalyptic number.

It is an amenable number.

945994081 is a deficient number, since it is larger than the sum of its proper divisors (94883).

945994081 is a wasteful number, since it uses less digits than its factorization.

945994081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94882.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 945994081 is about 30757.0167766642. The cubic root of 945994081 is about 981.6638682246.

The spelling of 945994081 in words is "nine hundred forty-five million, nine hundred ninety-four thousand, eighty-one".