680989154 has 8 divisors (see below), whose sum is σ = 1021924188. Its totient is φ = 340347760.

The previous prime is 680989147. The next prime is 680989159. The reversal of 680989154 is 451989086.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 678342025 + 2647129 = 26045^2 + 1627^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (680989159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67517 + ... + 76944.

Almost surely, 2^680989154 is an apocalyptic number.

680989154 is a deficient number, since it is larger than the sum of its proper divisors (340935034).

680989154 is a wasteful number, since it uses less digits than its factorization.

680989154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146820.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 680989154 is about 26095.7688907608. The cubic root of 680989154 is about 879.7921142896.

The spelling of 680989154 in words is "six hundred eighty million, nine hundred eighty-nine thousand, one hundred fifty-four".