68631487 has 12 divisors (see below), whose sum is σ = 72049120. Its totient is φ = 65362752.

The previous prime is 68631481. The next prime is 68631491. The reversal of 68631487 is 78413686.

It is not a de Polignac number, because 68631487 - 2⁷ = 68631359 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 (68631481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65923 + ... + 66955.

Almost surely, 2^68631487 is an apocalyptic number.

68631487 is a deficient number, since it is larger than the sum of its proper divisors (3417633).

68631487 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (68631486) it forms an eRAP, since the sums of their prime factors are consecutive (1169 and 1170).

68631487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170 (or 1141 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 68631487 is about 8284.4122905611. The cubic root of 68631487 is about 409.4251054340.

The spelling of 68631487 in words is "sixty-eight million, six hundred thirty-one thousand, four hundred eighty-seven".