68240247 has 16 divisors (see below), whose sum is σ = 93686112. Its totient is φ = 44150400.

The previous prime is 68240233. The next prime is 68240251. The reversal of 68240247 is 74204286.

It is not a de Polignac number, because 68240247 - 2⁷ = 68240119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68240297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77373 + ... + 78249.

It is an arithmetic number, because the mean of its divisors is an integer number (5855382).

Almost surely, 2^68240247 is an apocalyptic number.

68240247 is a deficient number, since it is larger than the sum of its proper divisors (25445865).

68240247 is a wasteful number, since it uses less digits than its factorization.

68240247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 68240247 is about 8260.7655214272. The cubic root of 68240247 is about 408.6456341201.

The spelling of 68240247 in words is "sixty-eight million, two hundred forty thousand, two hundred forty-seven".