894871645 has 4 divisors (see below), whose sum is σ = 1073845980. Its totient is φ = 715897312.

The previous prime is 894871609. The next prime is 894871651. The reversal of 894871645 is 546178498.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546178498 = 2 ⋅273089249.

It can be written as a sum of positive squares in 2 ways, for example, as 243703321 + 651168324 = 15611^2 + 25518^2 .

It is a cyclic number.

It is not a de Polignac number, because 894871645 - 2²⁷ = 760653917 is a prime.

It is a super-2 number, since 2×894871645² = 1601590522050012050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 894871592 and 894871601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89487160 + ... + 89487169.

It is an arithmetic number, because the mean of its divisors is an integer number (268461495).

Almost surely, 2^894871645 is an apocalyptic number.

It is an amenable number.

894871645 is a deficient number, since it is larger than the sum of its proper divisors (178974335).

894871645 is a wasteful number, since it uses less digits than its factorization.

894871645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178974334.

The product of its digits is 1935360, while the sum is 52.

The square root of 894871645 is about 29914.4053091483. The cubic root of 894871645 is about 963.6520487579.

The spelling of 894871645 in words is "eight hundred ninety-four million, eight hundred seventy-one thousand, six hundred forty-five".