420369449 has 2 divisors, whose sum is σ = 420369450. Its totient is φ = 420369448.

The previous prime is 420369431. The next prime is 420369451. The reversal of 420369449 is 944963024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 390339049 + 30030400 = 19757^2 + 5480^2 .

It is a cyclic number.

It is not a de Polignac number, because 420369449 - 2²⁰ = 419320873 is a prime.

Together with 420369451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420369949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210184724 + 210184725.

It is an arithmetic number, because the mean of its divisors is an integer number (210184725).

Almost surely, 2^420369449 is an apocalyptic number.

It is an amenable number.

420369449 is a deficient number, since it is larger than the sum of its proper divisors (1).

420369449 is an equidigital number, since it uses as much as digits as its factorization.

420369449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 420369449 is about 20502.9131832528. The cubic root of 420369449 is about 749.1067582108.

The spelling of 420369449 in words is "four hundred twenty million, three hundred sixty-nine thousand, four hundred forty-nine".