698935649 has 4 divisors (see below), whose sum is σ = 705721536. Its totient is φ = 692149764.

The previous prime is 698935639. The next prime is 698935681. The reversal of 698935649 is 946539896.

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 698935649 - 2¹² = 698931553 is a prime.

It is a super-2 number, since 2×698935649² = 977022082886102402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698935639) 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, 3392789 + ... + 3392994.

It is an arithmetic number, because the mean of its divisors is an integer number (176430384).

Almost surely, 2^698935649 is an apocalyptic number.

It is an amenable number.

698935649 is a deficient number, since it is larger than the sum of its proper divisors (6785887).

698935649 is a wasteful number, since it uses less digits than its factorization.

698935649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6785886.

The product of its digits is 12597120, while the sum is 59.

The square root of 698935649 is about 26437.3911156150. The cubic root of 698935649 is about 887.4537536968.

The spelling of 698935649 in words is "six hundred ninety-eight million, nine hundred thirty-five thousand, six hundred forty-nine".