420637339 has 2 divisors, whose sum is σ = 420637340. Its totient is φ = 420637338.

The previous prime is 420637313. The next prime is 420637361. The reversal of 420637339 is 933736024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420637339 - 2⁷ = 420637211 is a prime.

It is a super-4 number, since 4×420637339⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 420637298 and 420637307.

It is not a weakly prime, because it can be changed into another prime (420637439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210318669 + 210318670.

It is an arithmetic number, because the mean of its divisors is an integer number (210318670).

Almost surely, 2^420637339 is an apocalyptic number.

420637339 is a deficient number, since it is larger than the sum of its proper divisors (1).

420637339 is an equidigital number, since it uses as much as digits as its factorization.

420637339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 37.

The square root of 420637339 is about 20509.4451168236. The cubic root of 420637339 is about 749.2658528644.

The spelling of 420637339 in words is "four hundred twenty million, six hundred thirty-seven thousand, three hundred thirty-nine".