698093681 has 4 divisors (see below), whose sum is σ = 720612864. Its totient is φ = 675574500.

The previous prime is 698093663. The next prime is 698093701. The reversal of 698093681 is 186390896.

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 698093681 - 2¹⁰ = 698092657 is a prime.

It is a super-2 number, since 2×698093681² = 974669574904259522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (698093621) 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, 11259545 + ... + 11259606.

It is an arithmetic number, because the mean of its divisors is an integer number (180153216).

Almost surely, 2^698093681 is an apocalyptic number.

It is an amenable number.

698093681 is a deficient number, since it is larger than the sum of its proper divisors (22519183).

698093681 is a wasteful number, since it uses less digits than its factorization.

698093681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22519182.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 698093681 is about 26421.4625068333. The cubic root of 698093681 is about 887.0972554967.

The spelling of 698093681 in words is "six hundred ninety-eight million, ninety-three thousand, six hundred eighty-one".