68910487 has 2 divisors, whose sum is σ = 68910488. Its totient is φ = 68910486.

The previous prime is 68910431. The next prime is 68910493. The reversal of 68910487 is 78401986.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68910487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68910187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34455243 + 34455244.

It is an arithmetic number, because the mean of its divisors is an integer number (34455244).

Almost surely, 2^68910487 is an apocalyptic number.

68910487 is a deficient number, since it is larger than the sum of its proper divisors (1).

68910487 is an equidigital number, since it uses as much as digits as its factorization.

68910487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 68910487 is about 8301.2340648846. The cubic root of 68910487 is about 409.9791522217.

The spelling of 68910487 in words is "sixty-eight million, nine hundred ten thousand, four hundred eighty-seven".