68821503 has 4 divisors (see below), whose sum is σ = 91762008. Its totient is φ = 45881000.

The previous prime is 68821499. The next prime is 68821513. The reversal of 68821503 is 30512886.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68821503 - 2² = 68821499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68821513) 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, 11470248 + ... + 11470253.

It is an arithmetic number, because the mean of its divisors is an integer number (22940502).

Almost surely, 2^68821503 is an apocalyptic number.

68821503 is a deficient number, since it is larger than the sum of its proper divisors (22940505).

68821503 is a wasteful number, since it uses less digits than its factorization.

68821503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22940504.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 68821503 is about 8295.8726484921. The cubic root of 68821503 is about 409.8026077381.

It can be divided in two parts, 6882 and 1503, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 68821503 in words is "sixty-eight million, eight hundred twenty-one thousand, five hundred three".