68507249 has 4 divisors (see below), whose sum is σ = 68726436. Its totient is φ = 68288064.

The previous prime is 68507237. The next prime is 68507273. The reversal of 68507249 is 94270586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94270586 = 2 ⋅47135293.

It can be written as a sum of positive squares in 2 ways, for example, as 32890225 + 35617024 = 5735^2 + 5968^2 .

It is a cyclic number.

It is not a de Polignac number, because 68507249 - 2¹² = 68503153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68507849) 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, 109124 + ... + 109749.

It is an arithmetic number, because the mean of its divisors is an integer number (17181609).

Almost surely, 2^68507249 is an apocalyptic number.

It is an amenable number.

68507249 is a deficient number, since it is larger than the sum of its proper divisors (219187).

68507249 is a wasteful number, since it uses less digits than its factorization.

68507249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219186.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 68507249 is about 8276.9105951436. The cubic root of 68507249 is about 409.1779065543.

The spelling of 68507249 in words is "sixty-eight million, five hundred seven thousand, two hundred forty-nine".