68040247 has 4 divisors (see below), whose sum is σ = 74225736. Its totient is φ = 61854760.

The previous prime is 68040211. The next prime is 68040277. The reversal of 68040247 is 74204086.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68040247 - 2²³ = 59651639 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 (68040277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3092728 + ... + 3092749.

It is an arithmetic number, because the mean of its divisors is an integer number (18556434).

Almost surely, 2^68040247 is an apocalyptic number.

68040247 is a deficient number, since it is larger than the sum of its proper divisors (6185489).

68040247 is a wasteful number, since it uses less digits than its factorization.

68040247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6185488.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 68040247 is about 8248.6512230788. The cubic root of 68040247 is about 408.2460209633.

The spelling of 68040247 in words is "sixty-eight million, forty thousand, two hundred forty-seven".