898940691 has 36 divisors (see below), whose sum is σ = 1429569960. Its totient is φ = 539832960.

The previous prime is 898940689. The next prime is 898940699. The reversal of 898940691 is 196049898.

It is not a de Polignac number, because 898940691 - 2¹ = 898940689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (898940699) 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 35 ways as a sum of consecutive naturals, for example, 2197695 + ... + 2198103.

Almost surely, 2^898940691 is an apocalyptic number.

898940691 is a deficient number, since it is larger than the sum of its proper divisors (530629269).

898940691 is a wasteful number, since it uses less digits than its factorization.

898940691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 898940691 is about 29982.3396518684. The cubic root of 898940691 is about 965.1104390056.

The spelling of 898940691 in words is "eight hundred ninety-eight million, nine hundred forty thousand, six hundred ninety-one".