68507887 has 4 divisors (see below), whose sum is σ = 78294736. Its totient is φ = 58721040.

The previous prime is 68507867. The next prime is 68507953. The reversal of 68507887 is 78870586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78870586 = 2 ⋅39435293.

It is not a de Polignac number, because 68507887 - 2¹⁹ = 67983599 is a prime.

It is a super-3 number, since 3×68507887³ (a number of 24 digits) contains 333 as substring.

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 68507887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68507867) 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, 4893414 + ... + 4893427.

It is an arithmetic number, because the mean of its divisors is an integer number (19573684).

Almost surely, 2^68507887 is an apocalyptic number.

68507887 is a deficient number, since it is larger than the sum of its proper divisors (9786849).

68507887 is an equidigital number, since it uses as much as digits as its factorization.

68507887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9786848.

The product of its (nonzero) digits is 752640, while the sum is 49.

The square root of 68507887 is about 8276.9491360042. The cubic root of 68507887 is about 409.1791767590.

The spelling of 68507887 in words is "sixty-eight million, five hundred seven thousand, eight hundred eighty-seven".