523020517 has 2 divisors, whose sum is σ = 523020518. Its totient is φ = 523020516.

The previous prime is 523020479. The next prime is 523020541. The reversal of 523020517 is 715020325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310852161 + 212168356 = 17631^2 + 14566^2 .

It is a cyclic number.

It is not a de Polignac number, because 523020517 - 2⁷ = 523020389 is a prime.

It is a super-2 number, since 2×523020517² = 547100922405894578, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 523020491 and 523020500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523020557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261510258 + 261510259.

It is an arithmetic number, because the mean of its divisors is an integer number (261510259).

Almost surely, 2^523020517 is an apocalyptic number.

It is an amenable number.

523020517 is a deficient number, since it is larger than the sum of its proper divisors (1).

523020517 is an equidigital number, since it uses as much as digits as its factorization.

523020517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 523020517 is about 22869.6418205445. The cubic root of 523020517 is about 805.6991557224.

The spelling of 523020517 in words is "five hundred twenty-three million, twenty thousand, five hundred seventeen".