699021098 has 4 divisors (see below), whose sum is σ = 1048531650. Its totient is φ = 349510548.

The previous prime is 699021097. The next prime is 699021121. The reversal of 699021098 is 890120996.

699021098 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 469892329 + 229128769 = 21677^2 + 15137^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (699021097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174755273 + ... + 174755276.

Almost surely, 2^699021098 is an apocalyptic number.

699021098 is a deficient number, since it is larger than the sum of its proper divisors (349510552).

699021098 is a wasteful number, since it uses less digits than its factorization.

699021098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349510551.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 699021098 is about 26439.0071296182. The cubic root of 699021098 is about 887.4899177060.

The spelling of 699021098 in words is "six hundred ninety-nine million, twenty-one thousand, ninety-eight".