503681749 has 2 divisors, whose sum is σ = 503681750. Its totient is φ = 503681748.

The previous prime is 503681741. The next prime is 503681767. The reversal of 503681749 is 947186305.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418488849 + 85192900 = 20457^2 + 9230^2 .

It is a cyclic number.

It is not a de Polignac number, because 503681749 - 2³ = 503681741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (503681741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251840874 + 251840875.

It is an arithmetic number, because the mean of its divisors is an integer number (251840875).

Almost surely, 2^503681749 is an apocalyptic number.

It is an amenable number.

503681749 is a deficient number, since it is larger than the sum of its proper divisors (1).

503681749 is an equidigital number, since it uses as much as digits as its factorization.

503681749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 503681749 is about 22442.8551882331. The cubic root of 503681749 is about 795.6439011596.

The spelling of 503681749 in words is "five hundred three million, six hundred eighty-one thousand, seven hundred forty-nine".