894447480372421 has 2 divisors, whose sum is σ = 894447480372422. Its totient is φ = 894447480372420.

The previous prime is 894447480372389. The next prime is 894447480372497. The reversal of 894447480372421 is 124273084744498.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 774872402440900 + 119575077931521 = 27836530^2 + 10935039^2 .

It is a cyclic number.

It is not a de Polignac number, because 894447480372421 - 2⁵ = 894447480372389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (894447480372821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447223740186210 + 447223740186211.

It is an arithmetic number, because the mean of its divisors is an integer number (447223740186211).

Almost surely, 2^{894447480372421} is an apocalyptic number.

It is an amenable number.

894447480372421 is a deficient number, since it is larger than the sum of its proper divisors (1).

894447480372421 is an equidigital number, since it uses as much as digits as its factorization.

894447480372421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 346816512, while the sum is 67.

The spelling of 894447480372421 in words is "eight hundred ninety-four trillion, four hundred forty-seven billion, four hundred eighty million, three hundred seventy-two thousand, four hundred twenty-one".