545688698 has 4 divisors (see below), whose sum is σ = 818533050. Its totient is φ = 272844348.

The previous prime is 545688697. The next prime is 545688713. The reversal of 545688698 is 896886545.

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., 273009529 + 272679169 = 16523^2 + 16513^2 .

It is not an unprimeable number, because it can be changed into a prime (545688697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136422173 + ... + 136422176.

Almost surely, 2^545688698 is an apocalyptic number.

545688698 is a deficient number, since it is larger than the sum of its proper divisors (272844352).

545688698 is a wasteful number, since it uses less digits than its factorization.

545688698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272844351.

The product of its digits is 16588800, while the sum is 59.

The square root of 545688698 is about 23359.9806934852. The cubic root of 545688698 is about 817.1748393709.

The spelling of 545688698 in words is "five hundred forty-five million, six hundred eighty-eight thousand, six hundred ninety-eight".