894633661 has 2 divisors, whose sum is σ = 894633662. Its totient is φ = 894633660.

The previous prime is 894633617. The next prime is 894633671. The reversal of 894633661 is 166336498.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 638825625 + 255808036 = 25275^2 + 15994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-894633661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (894633671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447316830 + 447316831.

It is an arithmetic number, because the mean of its divisors is an integer number (447316831).

Almost surely, 2^894633661 is an apocalyptic number.

It is an amenable number.

894633661 is a deficient number, since it is larger than the sum of its proper divisors (1).

894633661 is an equidigital number, since it uses as much as digits as its factorization.

894633661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 46.

The square root of 894633661 is about 29910.4272955102. The cubic root of 894633661 is about 963.5666159835.

The spelling of 894633661 in words is "eight hundred ninety-four million, six hundred thirty-three thousand, six hundred sixty-one".