68151247 has 4 divisors (see below), whose sum is σ = 70501320. Its totient is φ = 65801176.

The previous prime is 68151241. The next prime is 68151301. The reversal of 68151247 is 74215186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74215186 = 2 ⋅37107593.

It is a cyclic number.

It is not a de Polignac number, because 68151247 - 2¹¹ = 68149199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68151241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1174993 + ... + 1175050.

It is an arithmetic number, because the mean of its divisors is an integer number (17625330).

Almost surely, 2^68151247 is an apocalyptic number.

68151247 is a deficient number, since it is larger than the sum of its proper divisors (2350073).

68151247 is a wasteful number, since it uses less digits than its factorization.

68151247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350072.

The product of its digits is 13440, while the sum is 34.

The square root of 68151247 is about 8255.3768539056. The cubic root of 68151247 is about 408.4679028168.

The spelling of 68151247 in words is "sixty-eight million, one hundred fifty-one thousand, two hundred forty-seven".