68781503 has 4 divisors (see below), whose sum is σ = 78607440. Its totient is φ = 58955568.

The previous prime is 68781499. The next prime is 68781527. The reversal of 68781503 is 30518786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30518786 = 2 ⋅15259393.

It is not a de Polignac number, because 68781503 - 2² = 68781499 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 (68781703) 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, 4912958 + ... + 4912971.

It is an arithmetic number, because the mean of its divisors is an integer number (19651860).

Almost surely, 2^68781503 is an apocalyptic number.

68781503 is a deficient number, since it is larger than the sum of its proper divisors (9825937).

68781503 is an equidigital number, since it uses as much as digits as its factorization.

68781503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9825936.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 68781503 is about 8293.4614606930. The cubic root of 68781503 is about 409.7231980556.

The spelling of 68781503 in words is "sixty-eight million, seven hundred eighty-one thousand, five hundred three".