894719981 has 4 divisors (see below), whose sum is σ = 895210464. Its totient is φ = 894229500.

The previous prime is 894719939. The next prime is 894719989. The reversal of 894719981 is 189917498.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 894719981 - 2²² = 890525677 is a prime.

It is a super-2 number, since 2×894719981² = 1601047688801280722, 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 (894719989) 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, 242495 + ... + 246156.

It is an arithmetic number, because the mean of its divisors is an integer number (223802616).

Almost surely, 2^894719981 is an apocalyptic number.

It is an amenable number.

894719981 is a deficient number, since it is larger than the sum of its proper divisors (490483).

894719981 is a wasteful number, since it uses less digits than its factorization.

894719981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490482.

The product of its digits is 1306368, while the sum is 56.

The square root of 894719981 is about 29911.8702357442. The cubic root of 894719981 is about 963.5976053515.

The spelling of 894719981 in words is "eight hundred ninety-four million, seven hundred nineteen thousand, nine hundred eighty-one".