894651691 has 2 divisors, whose sum is σ = 894651692. Its totient is φ = 894651690.

The previous prime is 894651683. The next prime is 894651701. The reversal of 894651691 is 196156498.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 894651691 - 2³ = 894651683 is a prime.

It is not a weakly prime, because it can be changed into another prime (894651491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447325845 + 447325846.

It is an arithmetic number, because the mean of its divisors is an integer number (447325846).

Almost surely, 2^894651691 is an apocalyptic number.

894651691 is a deficient number, since it is larger than the sum of its proper divisors (1).

894651691 is an equidigital number, since it uses as much as digits as its factorization.

894651691 is an evil number, because the sum of its binary digits is even.

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

The square root of 894651691 is about 29910.7286938984. The cubic root of 894651691 is about 963.5730890201.

The spelling of 894651691 in words is "eight hundred ninety-four million, six hundred fifty-one thousand, six hundred ninety-one".