689991527 has 8 divisors (see below), whose sum is σ = 700882800. Its totient is φ = 679117824.

The previous prime is 689991509. The next prime is 689991553. The reversal of 689991527 is 725199986.

689991527 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 689991527 - 2¹⁶ = 689925991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689991227) 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, 90749 + ... + 98057.

It is an arithmetic number, because the mean of its divisors is an integer number (87610350).

Almost surely, 2^689991527 is an apocalyptic number.

689991527 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

689991527 is a deficient number, since it is larger than the sum of its proper divisors (10891273).

689991527 is a wasteful number, since it uses less digits than its factorization.

689991527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8785.

The product of its digits is 2449440, while the sum is 56.

The square root of 689991527 is about 26267.6897918336. The cubic root of 689991527 is about 883.6519752140.

The spelling of 689991527 in words is "six hundred eighty-nine million, nine hundred ninety-one thousand, five hundred twenty-seven".