689954265 has 288 divisors, whose sum is σ = 1737904896. Its totient is φ = 244408320.

The previous prime is 689954263. The next prime is 689954323. The reversal of 689954265 is 562459986.

It is a happy number.

689954265 is a `hidden beast` number, since 6 + 8 + 99 + 542 + 6 + 5 = 666.

It is not a de Polignac number, because 689954265 - 2¹ = 689954263 is a prime.

It is a super-4 number, since 4×689954265⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (689954263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 13017979 + ... + 13018031.

It is an arithmetic number, because the mean of its divisors is an integer number (6034392).

Almost surely, 2^689954265 is an apocalyptic number.

689954265 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

689954265 is an abundant number, since it is smaller than the sum of its proper divisors (1047950631).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689954265 is a wasteful number, since it uses less digits than its factorization.

689954265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 109 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 689954265 is about 26266.9805078543. The cubic root of 689954265 is about 883.6360681430.

The spelling of 689954265 in words is "six hundred eighty-nine million, nine hundred fifty-four thousand, two hundred sixty-five".