698379921 has 32 divisors (see below), whose sum is σ = 1073703680. Its totient is φ = 448270848.

The previous prime is 698379919. The next prime is 698379923. The reversal of 698379921 is 129973896.

It is an interprime number because it is at equal distance from previous prime (698379919) and next prime (698379923).

It is not a de Polignac number, because 698379921 - 2¹ = 698379919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698379923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93300 + ... + 100506.

It is an arithmetic number, because the mean of its divisors is an integer number (33553240).

Almost surely, 2^698379921 is an apocalyptic number.

It is an amenable number.

698379921 is a deficient number, since it is larger than the sum of its proper divisors (375323759).

698379921 is a wasteful number, since it uses less digits than its factorization.

698379921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7350 (or 7344 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 698379921 is about 26426.8787600806. The cubic root of 698379921 is about 887.2184846993.

The spelling of 698379921 in words is "six hundred ninety-eight million, three hundred seventy-nine thousand, nine hundred twenty-one".