420007397 has 2 divisors, whose sum is σ = 420007398. Its totient is φ = 420007396.

The previous prime is 420007391. The next prime is 420007433. The reversal of 420007397 is 793700024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 403246561 + 16760836 = 20081^2 + 4094^2 .

It is a cyclic number.

It is not a de Polignac number, because 420007397 - 2⁶ = 420007333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420007391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210003698 + 210003699.

It is an arithmetic number, because the mean of its divisors is an integer number (210003699).

Almost surely, 2^420007397 is an apocalyptic number.

It is an amenable number.

420007397 is a deficient number, since it is larger than the sum of its proper divisors (1).

420007397 is an equidigital number, since it uses as much as digits as its factorization.

420007397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 420007397 is about 20494.0819994456. The cubic root of 420007397 is about 748.8916351396.

The spelling of 420007397 in words is "four hundred twenty million, seven thousand, three hundred ninety-seven".