68435887 has 4 divisors (see below), whose sum is σ = 73700200. Its totient is φ = 63171576.

The previous prime is 68435881. The next prime is 68435893. The reversal of 68435887 is 78853486.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (68435881) and next prime (68435893).

It is not a de Polignac number, because 68435887 - 2¹⁵ = 68403119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68435887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68435881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2632137 + ... + 2632162.

It is an arithmetic number, because the mean of its divisors is an integer number (18425050).

Almost surely, 2^68435887 is an apocalyptic number.

68435887 is a deficient number, since it is larger than the sum of its proper divisors (5264313).

68435887 is a wasteful number, since it uses less digits than its factorization.

68435887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5264312.

The product of its digits is 1290240, while the sum is 49.

The square root of 68435887 is about 8272.5985639338. The cubic root of 68435887 is about 409.0357809695.

The spelling of 68435887 in words is "sixty-eight million, four hundred thirty-five thousand, eight hundred eighty-seven".