2503948721 has 2 divisors, whose sum is σ = 2503948722. Its totient is φ = 2503948720.

The previous prime is 2503948651. The next prime is 2503948729. The reversal of 2503948721 is 1278493052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1369000000 + 1134948721 = 37000^2 + 33689^2 .

It is a cyclic number.

It is not a de Polignac number, because 2503948721 - 2²² = 2499754417 is a prime.

It is not a weakly prime, because it can be changed into another prime (2503948729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1251974360 + 1251974361.

It is an arithmetic number, because the mean of its divisors is an integer number (1251974361).

Almost surely, 2^2503948721 is an apocalyptic number.

It is an amenable number.

2503948721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2503948721 is an equidigital number, since it uses as much as digits as its factorization.

2503948721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 2503948721 is about 50039.4716299043. The cubic root of 2503948721 is about 1357.9229976011.

The spelling of 2503948721 in words is "two billion, five hundred three million, nine hundred forty-eight thousand, seven hundred twenty-one".