501379121 has 2 divisors, whose sum is σ = 501379122. Its totient is φ = 501379120.

The previous prime is 501379031. The next prime is 501379133. The reversal of 501379121 is 121973105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 496799521 + 4579600 = 22289^2 + 2140^2 .

It is a cyclic number.

It is not a de Polignac number, because 501379121 - 2²⁶ = 434270257 is a prime.

It is not a weakly prime, because it can be changed into another prime (501379321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250689560 + 250689561.

It is an arithmetic number, because the mean of its divisors is an integer number (250689561).

Almost surely, 2^501379121 is an apocalyptic number.

It is an amenable number.

501379121 is a deficient number, since it is larger than the sum of its proper divisors (1).

501379121 is an equidigital number, since it uses as much as digits as its factorization.

501379121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 501379121 is about 22391.4966226021. The cubic root of 501379121 is about 794.4295954531.

The spelling of 501379121 in words is "five hundred one million, three hundred seventy-nine thousand, one hundred twenty-one".