68678517 has 4 divisors (see below), whose sum is σ = 91571360. Its totient is φ = 45785676.

The previous prime is 68678509. The next prime is 68678531. The reversal of 68678517 is 71587686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68678517 - 2³ = 68678509 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 (68678507) 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, 11446417 + ... + 11446422.

It is an arithmetic number, because the mean of its divisors is an integer number (22892840).

Almost surely, 2^68678517 is an apocalyptic number.

It is an amenable number.

68678517 is a deficient number, since it is larger than the sum of its proper divisors (22892843).

68678517 is a wasteful number, since it uses less digits than its factorization.

68678517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22892842.

The product of its digits is 564480, while the sum is 48.

The square root of 68678517 is about 8287.2502677305. The cubic root of 68678517 is about 409.5186041422.

The spelling of 68678517 in words is "sixty-eight million, six hundred seventy-eight thousand, five hundred seventeen".