523621393 has 2 divisors, whose sum is σ = 523621394. Its totient is φ = 523621392.

The previous prime is 523621333. The next prime is 523621411. The reversal of 523621393 is 393126325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 453178944 + 70442449 = 21288^2 + 8393^2 .

It is a cyclic number.

It is not a de Polignac number, because 523621393 - 2¹³ = 523613201 is a prime.

It is not a weakly prime, because it can be changed into another prime (523621333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261810696 + 261810697.

It is an arithmetic number, because the mean of its divisors is an integer number (261810697).

Almost surely, 2^523621393 is an apocalyptic number.

It is an amenable number.

523621393 is a deficient number, since it is larger than the sum of its proper divisors (1).

523621393 is an equidigital number, since it uses as much as digits as its factorization.

523621393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 34.

The square root of 523621393 is about 22882.7750283920. The cubic root of 523621393 is about 806.0075821234.

The spelling of 523621393 in words is "five hundred twenty-three million, six hundred twenty-one thousand, three hundred ninety-three".