68021375 has 8 divisors (see below), whose sum is σ = 84890832. Its totient is φ = 54417000.

The previous prime is 68021339. The next prime is 68021377. The reversal of 68021375 is 57312086.

It is a happy number.

It is not a de Polignac number, because 68021375 - 2⁸ = 68021119 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 (68021377) 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, 271961 + ... + 272210.

It is an arithmetic number, because the mean of its divisors is an integer number (10611354).

Almost surely, 2^68021375 is an apocalyptic number.

68021375 is a deficient number, since it is larger than the sum of its proper divisors (16869457).

68021375 is an equidigital number, since it uses as much as digits as its factorization.

68021375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544186 (or 544176 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 68021375 is about 8247.5071991481. The cubic root of 68021375 is about 408.2082730534.

The spelling of 68021375 in words is "sixty-eight million, twenty-one thousand, three hundred seventy-five".