899473698 has 18 divisors (see below), whose sum is σ = 1949135409. Its totient is φ = 299782152.

The previous prime is 899473693. The next prime is 899473763. The reversal of 899473698 is 896374998.

It can be written as a sum of positive squares in 2 ways, for example, as 878707449 + 20766249 = 29643^2 + 4557^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=21207.

It is not an unprimeable number, because it can be changed into a prime (899473693) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 123708 + ... + 130776.

Almost surely, 2^899473698 is an apocalyptic number.

899473698 is an abundant number, since it is smaller than the sum of its proper divisors (1049661711).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

899473698 is an frugal number, since it uses more digits than its factorization.

899473698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14146 (or 7074 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 899473698 is about 29991.2270172462. The cubic root of 899473698 is about 965.3011482811.

The spelling of 899473698 in words is "eight hundred ninety-nine million, four hundred seventy-three thousand, six hundred ninety-eight".