894462921443909 has 4 divisors (see below), whose sum is σ = 894463329719916. Its totient is φ = 894462513167904.

The previous prime is 894462921443809. The next prime is 894462921443977. The reversal of 894462921443909 is 909344129264498.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 279683145112900 + 614779776331009 = 16723730^2 + 24794753^2 .

It is a cyclic number.

It is not a de Polignac number, because 894462921443909 - 2⁸ = 894462921443653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (894462921443999) 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, 200833934 + ... + 205239359.

It is an arithmetic number, because the mean of its divisors is an integer number (223615832429979).

Almost surely, 2^{894462921443909} is an apocalyptic number.

It is an amenable number.

894462921443909 is a deficient number, since it is larger than the sum of its proper divisors (408276007).

894462921443909 is a wasteful number, since it uses less digits than its factorization.

894462921443909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408276006.

The product of its (nonzero) digits is 967458816, while the sum is 74.

The spelling of 894462921443909 in words is "eight hundred ninety-four trillion, four hundred sixty-two billion, nine hundred twenty-one million, four hundred forty-three thousand, nine hundred nine".