689402451 has 4 divisors (see below), whose sum is σ = 919203272. Its totient is φ = 459601632.

The previous prime is 689402449. The next prime is 689402477. The reversal of 689402451 is 154204986.

689402451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 689402451 - 2¹ = 689402449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689402401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114900406 + ... + 114900411.

It is an arithmetic number, because the mean of its divisors is an integer number (229800818).

Almost surely, 2^689402451 is an apocalyptic number.

689402451 is a deficient number, since it is larger than the sum of its proper divisors (229800821).

689402451 is a wasteful number, since it uses less digits than its factorization.

689402451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229800820.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 689402451 is about 26256.4744586930. The cubic root of 689402451 is about 883.4004328128.

The spelling of 689402451 in words is "six hundred eighty-nine million, four hundred two thousand, four hundred fifty-one".