945236981 has 8 divisors (see below), whose sum is σ = 1018186680. Its totient is φ = 872321472.

The previous prime is 945236959. The next prime is 945236989. The reversal of 945236981 is 189632549.

It can be written as a sum of positive squares in 4 ways, for example, as 405418225 + 539818756 = 20135^2 + 23234^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-945236981 is a prime.

It is a super-2 number, since 2×945236981² = 1786945900499988722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945236989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100175 + ... + 109203.

It is an arithmetic number, because the mean of its divisors is an integer number (127273335).

Almost surely, 2^945236981 is an apocalyptic number.

It is an amenable number.

945236981 is a deficient number, since it is larger than the sum of its proper divisors (72949699).

945236981 is a wasteful number, since it uses less digits than its factorization.

945236981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17095.

The product of its digits is 466560, while the sum is 47.

The square root of 945236981 is about 30744.7065525108. The cubic root of 945236981 is about 981.4019158900.

The spelling of 945236981 in words is "nine hundred forty-five million, two hundred thirty-six thousand, nine hundred eighty-one".