898422691 has 4 divisors (see below), whose sum is σ = 898571232. Its totient is φ = 898274152.

The previous prime is 898422683. The next prime is 898422731. The reversal of 898422691 is 196224898.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196224898 = 2 ⋅98112449.

It is a cyclic number.

It is not a de Polignac number, because 898422691 - 2³ = 898422683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (898422661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64795 + ... + 77428.

It is an arithmetic number, because the mean of its divisors is an integer number (224642808).

Almost surely, 2^898422691 is an apocalyptic number.

898422691 is a deficient number, since it is larger than the sum of its proper divisors (148541).

898422691 is a wasteful number, since it uses less digits than its factorization.

898422691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148540.

The product of its digits is 497664, while the sum is 49.

The square root of 898422691 is about 29973.6999884899. The cubic root of 898422691 is about 964.9250269726.

The spelling of 898422691 in words is "eight hundred ninety-eight million, four hundred twenty-two thousand, six hundred ninety-one".