521104357 has 2 divisors, whose sum is σ = 521104358. Its totient is φ = 521104356.

The previous prime is 521104351. The next prime is 521104373. The reversal of 521104357 is 753401125.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 505980036 + 15124321 = 22494^2 + 3889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521104357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521104351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260552178 + 260552179.

It is an arithmetic number, because the mean of its divisors is an integer number (260552179).

Almost surely, 2^521104357 is an apocalyptic number.

It is an amenable number.

521104357 is a deficient number, since it is larger than the sum of its proper divisors (1).

521104357 is an equidigital number, since it uses as much as digits as its factorization.

521104357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 521104357 is about 22827.7102881564. The cubic root of 521104357 is about 804.7140205570.

The spelling of 521104357 in words is "five hundred twenty-one million, one hundred four thousand, three hundred fifty-seven".