689875491 has 8 divisors (see below), whose sum is σ = 920384080. Its totient is φ = 459641952.

The previous prime is 689875481. The next prime is 689875493. The reversal of 689875491 is 194578986.

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

It is not a de Polignac number, because 689875491 - 2²⁷ = 555657763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689875493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62836 + ... + 72993.

It is an arithmetic number, because the mean of its divisors is an integer number (115048010).

Almost surely, 2^689875491 is an apocalyptic number.

689875491 is a deficient number, since it is larger than the sum of its proper divisors (230508589).

689875491 is a wasteful number, since it uses less digits than its factorization.

689875491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137525.

The product of its digits is 4354560, while the sum is 57.

The square root of 689875491 is about 26265.4809778919. The cubic root of 689875491 is about 883.6024377995.

The spelling of 689875491 in words is "six hundred eighty-nine million, eight hundred seventy-five thousand, four hundred ninety-one".