864513898 has 4 divisors (see below), whose sum is σ = 1296770850. Its totient is φ = 432256948.

The previous prime is 864513893. The next prime is 864513913. The reversal of 864513898 is 898315468.

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., 552391009 + 312122889 = 23503^2 + 17667^2 .

It is not an unprimeable number, because it can be changed into a prime (864513893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216128473 + ... + 216128476.

Almost surely, 2^864513898 is an apocalyptic number.

864513898 is a deficient number, since it is larger than the sum of its proper divisors (432256952).

864513898 is a wasteful number, since it uses less digits than its factorization.

864513898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432256951.

The product of its digits is 1658880, while the sum is 52.

The square root of 864513898 is about 29402.6171964334. The cubic root of 864513898 is about 952.6294276031.

The spelling of 864513898 in words is "eight hundred sixty-four million, five hundred thirteen thousand, eight hundred ninety-eight".