469561021 has 2 divisors, whose sum is σ = 469561022. Its totient is φ = 469561020.

The previous prime is 469561013. The next prime is 469561033. The reversal of 469561021 is 120165964.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335256100 + 134304921 = 18310^2 + 11589^2 .

It is a cyclic number.

It is not a de Polignac number, because 469561021 - 2³ = 469561013 is a prime.

It is equal to p_24833824 and since 469561021 and 24833824 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (469561051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 234780510 + 234780511.

It is an arithmetic number, because the mean of its divisors is an integer number (234780511).

Almost surely, 2^469561021 is an apocalyptic number.

It is an amenable number.

469561021 is a deficient number, since it is larger than the sum of its proper divisors (1).

469561021 is an equidigital number, since it uses as much as digits as its factorization.

469561021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 469561021 is about 21669.3567278773. The cubic root of 469561021 is about 777.2558738382.

The spelling of 469561021 in words is "four hundred sixty-nine million, five hundred sixty-one thousand, twenty-one".