420743437 has 2 divisors, whose sum is σ = 420743438. Its totient is φ = 420743436.

The previous prime is 420743371. The next prime is 420743443. The reversal of 420743437 is 734347024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418652521 + 2090916 = 20461^2 + 1446^2 .

It is a cyclic number.

It is not a de Polignac number, because 420743437 - 2¹⁵ = 420710669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420743447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210371718 + 210371719.

It is an arithmetic number, because the mean of its divisors is an integer number (210371719).

Almost surely, 2^420743437 is an apocalyptic number.

It is an amenable number.

420743437 is a deficient number, since it is larger than the sum of its proper divisors (1).

420743437 is an equidigital number, since it uses as much as digits as its factorization.

420743437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 34.

The square root of 420743437 is about 20512.0315181115. The cubic root of 420743437 is about 749.3288437263.

The spelling of 420743437 in words is "four hundred twenty million, seven hundred forty-three thousand, four hundred thirty-seven".