921903116503 has 2 divisors, whose sum is σ = 921903116504. Its totient is φ = 921903116502.

The previous prime is 921903116471. The next prime is 921903116507. The reversal of 921903116503 is 305611309129.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 921903116503 - 2⁵ = 921903116471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921903116507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460951558251 + 460951558252.

It is an arithmetic number, because the mean of its divisors is an integer number (460951558252).

Almost surely, 2^921903116503 is an apocalyptic number.

921903116503 is a deficient number, since it is larger than the sum of its proper divisors (1).

921903116503 is an equidigital number, since it uses as much as digits as its factorization.

921903116503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 40.

The spelling of 921903116503 in words is "nine hundred twenty-one billion, nine hundred three million, one hundred sixteen thousand, five hundred three".