521994029 has 2 divisors, whose sum is σ = 521994030. Its totient is φ = 521994028.

The previous prime is 521994017. The next prime is 521994037. The reversal of 521994029 is 920499125.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 441084004 + 80910025 = 21002^2 + 8995^2 .

It is a cyclic number.

It is not a de Polignac number, because 521994029 - 2²⁴ = 505216813 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521996029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260997014 + 260997015.

It is an arithmetic number, because the mean of its divisors is an integer number (260997015).

Almost surely, 2^521994029 is an apocalyptic number.

It is an amenable number.

521994029 is a deficient number, since it is larger than the sum of its proper divisors (1).

521994029 is an equidigital number, since it uses as much as digits as its factorization.

521994029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 521994029 is about 22847.1886454329. The cubic root of 521994029 is about 805.1717180580.

The spelling of 521994029 in words is "five hundred twenty-one million, nine hundred ninety-four thousand, twenty-nine".