698121896 has 8 divisors (see below), whose sum is σ = 1308978570. Its totient is φ = 349060944.

The previous prime is 698121889. The next prime is 698121917.

It is a happy number.

698121896 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 697699396 + 422500 = 26414^2 + 650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 43632611 + ... + 43632626.

Almost surely, 2^698121896 is an apocalyptic number.

It is an amenable number.

698121896 is a deficient number, since it is larger than the sum of its proper divisors (610856674).

698121896 is a wasteful number, since it uses less digits than its factorization.

698121896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87265243 (or 87265239 counting only the distinct ones).

The product of its digits is 373248, while the sum is 50.

The square root of 698121896 is about 26421.9964423584. The cubic root of 698121896 is about 887.1092066682.

The spelling of 698121896 in words is "six hundred ninety-eight million, one hundred twenty-one thousand, eight hundred ninety-six".