68616487 has 2 divisors, whose sum is σ = 68616488. Its totient is φ = 68616486.

The previous prime is 68616473. The next prime is 68616491. The reversal of 68616487 is 78461686.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68616487 - 2²³ = 60227879 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68616187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34308243 + 34308244.

It is an arithmetic number, because the mean of its divisors is an integer number (34308244).

Almost surely, 2^68616487 is an apocalyptic number.

68616487 is a deficient number, since it is larger than the sum of its proper divisors (1).

68616487 is an equidigital number, since it uses as much as digits as its factorization.

68616487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 46.

The square root of 68616487 is about 8283.5069264171. The cubic root of 68616487 is about 409.3952754715.

The spelling of 68616487 in words is "sixty-eight million, six hundred sixteen thousand, four hundred eighty-seven".