698676409 has 4 divisors (see below), whose sum is σ = 700908916. Its totient is φ = 696443904.

The previous prime is 698676389. The next prime is 698676437. The reversal of 698676409 is 904676896.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205836409 + 492840000 = 14347^2 + 22200^2 .

It is a cyclic number.

It is not a de Polignac number, because 698676409 - 2¹⁵ = 698643641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 698676409.

It is not an unprimeable number, because it can be changed into a prime (698676499) 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, 1115784 + ... + 1116409.

It is an arithmetic number, because the mean of its divisors is an integer number (175227229).

Almost surely, 2^698676409 is an apocalyptic number.

It is an amenable number.

698676409 is a deficient number, since it is larger than the sum of its proper divisors (2232507).

698676409 is a wasteful number, since it uses less digits than its factorization.

698676409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232506.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The square root of 698676409 is about 26432.4877565469. The cubic root of 698676409 is about 887.3440192449.

The spelling of 698676409 in words is "six hundred ninety-eight million, six hundred seventy-six thousand, four hundred nine".