421293569 has 2 divisors, whose sum is σ = 421293570. Its totient is φ = 421293568.

The previous prime is 421293539. The next prime is 421293577. The reversal of 421293569 is 965392124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384630544 + 36663025 = 19612^2 + 6055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421293569 is a prime.

It is a super-2 number, since 2×421293569² = 354976542561515522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (421293539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210646784 + 210646785.

It is an arithmetic number, because the mean of its divisors is an integer number (210646785).

Almost surely, 2^421293569 is an apocalyptic number.

It is an amenable number.

421293569 is a deficient number, since it is larger than the sum of its proper divisors (1).

421293569 is an equidigital number, since it uses as much as digits as its factorization.

421293569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 41.

The square root of 421293569 is about 20525.4371208021. The cubic root of 421293569 is about 749.6552898872.

The spelling of 421293569 in words is "four hundred twenty-one million, two hundred ninety-three thousand, five hundred sixty-nine".