698749690 has 16 divisors (see below), whose sum is σ = 1259881128. Its totient is φ = 279026176.

The previous prime is 698749679. The next prime is 698749717. The reversal of 698749690 is 96947896.

698749690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 370524001 + 328225689 = 19249^2 + 18117^2 .

It is a super-2 number, since 2×698749690² = 976502258550192200, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52987 + ... + 64846.

Almost surely, 2^698749690 is an apocalyptic number.

698749690 is a deficient number, since it is larger than the sum of its proper divisors (561131438).

698749690 is a wasteful number, since it uses less digits than its factorization.

698749690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118433.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The square root of 698749690 is about 26433.8739120848. The cubic root of 698749690 is about 887.3750413237.

The spelling of 698749690 in words is "six hundred ninety-eight million, seven hundred forty-nine thousand, six hundred ninety".