420444457 has 2 divisors, whose sum is σ = 420444458. Its totient is φ = 420444456.

The previous prime is 420444433. The next prime is 420444473. The reversal of 420444457 is 754444024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288286441 + 132158016 = 16979^2 + 11496^2 .

It is a cyclic number.

It is not a de Polignac number, because 420444457 - 2¹¹ = 420442409 is a prime.

It is not a weakly prime, because it can be changed into another prime (420444257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210222228 + 210222229.

It is an arithmetic number, because the mean of its divisors is an integer number (210222229).

Almost surely, 2^420444457 is an apocalyptic number.

It is an amenable number.

420444457 is a deficient number, since it is larger than the sum of its proper divisors (1).

420444457 is an equidigital number, since it uses as much as digits as its factorization.

420444457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71680, while the sum is 34.

The square root of 420444457 is about 20504.7423051352. The cubic root of 420444457 is about 749.1513108126.

The spelling of 420444457 in words is "four hundred twenty million, four hundred forty-four thousand, four hundred fifty-seven".