68740047 has 24 divisors (see below), whose sum is σ = 100941984. Its totient is φ = 45072384.

The previous prime is 68740013. The next prime is 68740069. The reversal of 68740047 is 74004786.

It is a happy number.

It is not a de Polignac number, because 68740047 - 2⁷ = 68739919 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 68739993 and 68740020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68740097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 261238 + ... + 261500.

It is an arithmetic number, because the mean of its divisors is an integer number (4205916).

Almost surely, 2^68740047 is an apocalyptic number.

68740047 is a deficient number, since it is larger than the sum of its proper divisors (32201937).

68740047 is a wasteful number, since it uses less digits than its factorization.

68740047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 68740047 is about 8290.9617656820. The cubic root of 68740047 is about 409.6408653654.

The spelling of 68740047 in words is "sixty-eight million, seven hundred forty thousand, forty-seven".