68687417 has 4 divisors (see below), whose sum is σ = 69983460. Its totient is φ = 67391376.

The previous prime is 68687393. The next prime is 68687467. The reversal of 68687417 is 71478686.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29986576 + 38700841 = 5476^2 + 6221^2 .

It is a cyclic number.

It is not a de Polignac number, because 68687417 - 2²⁶ = 1578553 is a prime.

It is a super-2 number, since 2×68687417² = 9435922508263778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68687467) 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, 647942 + ... + 648047.

It is an arithmetic number, because the mean of its divisors is an integer number (17495865).

Almost surely, 2^68687417 is an apocalyptic number.

It is an amenable number.

68687417 is a deficient number, since it is larger than the sum of its proper divisors (1296043).

68687417 is a wasteful number, since it uses less digits than its factorization.

68687417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296042.

The product of its digits is 451584, while the sum is 47.

The square root of 68687417 is about 8287.7872197590. The cubic root of 68687417 is about 409.5362931194.

The spelling of 68687417 in words is "sixty-eight million, six hundred eighty-seven thousand, four hundred seventeen".