68643469 has 4 divisors (see below), whose sum is σ = 68724796. Its totient is φ = 68562144.

The previous prime is 68643461. The next prime is 68643479. The reversal of 68643469 is 96434686.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20160100 + 48483369 = 4490^2 + 6963^2 .

It is a cyclic number.

It is not a de Polignac number, because 68643469 - 2³ = 68643461 is a prime.

It is a super-2 number, since 2×68643469² = 9423851672707922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68643461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39384 + ... + 41089.

It is an arithmetic number, because the mean of its divisors is an integer number (17181199).

Almost surely, 2^68643469 is an apocalyptic number.

It is an amenable number.

68643469 is a deficient number, since it is larger than the sum of its proper divisors (81327).

68643469 is an equidigital number, since it uses as much as digits as its factorization.

68643469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81326.

The product of its digits is 746496, while the sum is 46.

The square root of 68643469 is about 8285.1354243609. The cubic root of 68643469 is about 409.4489304856.

The spelling of 68643469 in words is "sixty-eight million, six hundred forty-three thousand, four hundred sixty-nine".