68960257 has 4 divisors (see below), whose sum is σ = 68976900. Its totient is φ = 68943616.

The previous prime is 68960249. The next prime is 68960293. The reversal of 68960257 is 75206986.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75206986 = 2 ⋅37603493.

It can be written as a sum of positive squares in 2 ways, for example, as 30569841 + 38390416 = 5529^2 + 6196^2 .

It is a cyclic number.

It is not a de Polignac number, because 68960257 - 2³ = 68960249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68960357) 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, 3369 + ... + 12217.

It is an arithmetic number, because the mean of its divisors is an integer number (17244225).

It is a Proth number, since it is equal to 4209 ⋅ 2¹⁴ + 1 and 4209 < 2¹⁴.

Almost surely, 2^68960257 is an apocalyptic number.

It is an amenable number.

68960257 is a deficient number, since it is larger than the sum of its proper divisors (16643).

68960257 is an equidigital number, since it uses as much as digits as its factorization.

68960257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16642.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 68960257 is about 8304.2312708643. The cubic root of 68960257 is about 410.0778297617.

The spelling of 68960257 in words is "sixty-eight million, nine hundred sixty thousand, two hundred fifty-seven".