68881487 has 2 divisors, whose sum is σ = 68881488. Its totient is φ = 68881486.

The previous prime is 68881471. The next prime is 68881493. The reversal of 68881487 is 78418886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68881487 - 2⁴ = 68881471 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 (68881447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34440743 + 34440744.

It is an arithmetic number, because the mean of its divisors is an integer number (34440744).

Almost surely, 2^68881487 is an apocalyptic number.

68881487 is a deficient number, since it is larger than the sum of its proper divisors (1).

68881487 is an equidigital number, since it uses as much as digits as its factorization.

68881487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 688128, while the sum is 50.

The square root of 68881487 is about 8299.4871528306. The cubic root of 68881487 is about 409.9216328506.

The spelling of 68881487 in words is "sixty-eight million, eight hundred eighty-one thousand, four hundred eighty-seven".