68471507 has 4 divisors (see below), whose sum is σ = 73738560. Its totient is φ = 63204456.

The previous prime is 68471489. The next prime is 68471519. The reversal of 68471507 is 70517486.

68471507 = 2289² + 2290² + ... + 2301².

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

It is a cyclic number.

It is not a de Polignac number, because 68471507 - 2⁸ = 68471251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68471537) 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, 2633507 + ... + 2633532.

It is an arithmetic number, because the mean of its divisors is an integer number (18434640).

Almost surely, 2^68471507 is an apocalyptic number.

68471507 is a deficient number, since it is larger than the sum of its proper divisors (5267053).

68471507 is a wasteful number, since it uses less digits than its factorization.

68471507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5267052.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 68471507 is about 8274.7511745067. The cubic root of 68471507 is about 409.1067346171.

The spelling of 68471507 in words is "sixty-eight million, four hundred seventy-one thousand, five hundred seven".