469745021 has 2 divisors, whose sum is σ = 469745022. Its totient is φ = 469745020.

The previous prime is 469745011. The next prime is 469745033. The reversal of 469745021 is 120547964.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236083225 + 233661796 = 15365^2 + 15286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-469745021 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 (469745011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 234872510 + 234872511.

It is an arithmetic number, because the mean of its divisors is an integer number (234872511).

Almost surely, 2^469745021 is an apocalyptic number.

It is an amenable number.

469745021 is a deficient number, since it is larger than the sum of its proper divisors (1).

469745021 is an equidigital number, since it uses as much as digits as its factorization.

469745021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 469745021 is about 21673.6019387641. The cubic root of 469745021 is about 777.3573845386.

The spelling of 469745021 in words is "four hundred sixty-nine million, seven hundred forty-five thousand, twenty-one".