690354894 has 16 divisors (see below), whose sum is σ = 1410087168. Its totient is φ = 225222072.

The previous prime is 690354893. The next prime is 690354961. The reversal of 690354894 is 498453096.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690354893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1223752 + ... + 1224315.

It is an arithmetic number, because the mean of its divisors is an integer number (88130448).

Almost surely, 2^690354894 is an apocalyptic number.

690354894 is an abundant number, since it is smaller than the sum of its proper divisors (719732274).

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

690354894 is a wasteful number, since it uses less digits than its factorization.

690354894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448119.

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 690354894 is about 26274.6054965626. The cubic root of 690354894 is about 883.8070658234.

The spelling of 690354894 in words is "six hundred ninety million, three hundred fifty-four thousand, eight hundred ninety-four".