894955021 has 4 divisors (see below), whose sum is σ = 947599452. Its totient is φ = 842310592.

The previous prime is 894955013. The next prime is 894955031. The reversal of 894955021 is 120559498.

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 681940996 + 213014025 = 26114^2 + 14595^2 .

It is a cyclic number.

It is not a de Polignac number, because 894955021 - 2³ = 894955013 is a prime.

It is a super-2 number, since 2×894955021² = 1601888979226220882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (894955031) 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, 26322190 + ... + 26322223.

It is an arithmetic number, because the mean of its divisors is an integer number (236899863).

Almost surely, 2^894955021 is an apocalyptic number.

It is an amenable number.

894955021 is a deficient number, since it is larger than the sum of its proper divisors (52644431).

894955021 is a wasteful number, since it uses less digits than its factorization.

894955021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52644430.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 894955021 is about 29915.7988527801. The cubic root of 894955021 is about 963.6819759392.

The spelling of 894955021 in words is "eight hundred ninety-four million, nine hundred fifty-five thousand, twenty-one".