68689481 has 4 divisors (see below), whose sum is σ = 78502272. Its totient is φ = 58876692.

The previous prime is 68689463. The next prime is 68689493. The reversal of 68689481 is 18498686.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68689481 - 2⁶ = 68689417 is a prime.

It is a super-2 number, since 2×68689481² = 9436489600098722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68689421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4906385 + ... + 4906398.

It is an arithmetic number, because the mean of its divisors is an integer number (19625568).

Almost surely, 2^68689481 is an apocalyptic number.

It is an amenable number.

68689481 is a deficient number, since it is larger than the sum of its proper divisors (9812791).

68689481 is an equidigital number, since it uses as much as digits as its factorization.

68689481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9812790.

The product of its digits is 663552, while the sum is 50.

The square root of 68689481 is about 8287.9117393949. The cubic root of 68689481 is about 409.5403951538.

The spelling of 68689481 in words is "sixty-eight million, six hundred eighty-nine thousand, four hundred eighty-one".