689132925 has 36 divisors (see below), whose sum is σ = 1329266484. Its totient is φ = 339264000.

The previous prime is 689132903. The next prime is 689132947. The reversal of 689132925 is 529231986.

It is an interprime number because it is at equal distance from previous prime (689132903) and next prime (689132947).

It can be written as a sum of positive squares in 6 ways, for example, as 13704804 + 675428121 = 3702^2 + 25989^2 .

It is not a de Polignac number, because 689132925 - 2⁸ = 689132669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 114876 + ... + 120725.

It is an arithmetic number, because the mean of its divisors is an integer number (36924069).

Almost surely, 2^689132925 is an apocalyptic number.

689132925 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

689132925 is a deficient number, since it is larger than the sum of its proper divisors (640133559).

689132925 is a wasteful number, since it uses less digits than its factorization.

689132925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235630 (or 235622 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 689132925 is about 26251.3413942983. The cubic root of 689132925 is about 883.2852942508.

The spelling of 689132925 in words is "six hundred eighty-nine million, one hundred thirty-two thousand, nine hundred twenty-five".