68181087 has 16 divisors (see below), whose sum is σ = 99283968. Its totient is φ = 41364960.

The previous prime is 68181083. The next prime is 68181089. The reversal of 68181087 is 78018186.

It is not a de Polignac number, because 68181087 - 2² = 68181083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68181083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9543 + ... + 15080.

It is an arithmetic number, because the mean of its divisors is an integer number (6205248).

Almost surely, 2^68181087 is an apocalyptic number.

68181087 is a deficient number, since it is larger than the sum of its proper divisors (31102881).

68181087 is a wasteful number, since it uses less digits than its factorization.

68181087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24710.

The product of its (nonzero) digits is 21504, while the sum is 39.

The square root of 68181087 is about 8257.1839630712. The cubic root of 68181087 is about 408.5275099615.

The spelling of 68181087 in words is "sixty-eight million, one hundred eighty-one thousand, eighty-seven".