420351523 has 2 divisors, whose sum is σ = 420351524. Its totient is φ = 420351522.

The previous prime is 420351511. The next prime is 420351551. The reversal of 420351523 is 325153024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420351523 - 2²¹ = 418254371 is a prime.

It is not a weakly prime, because it can be changed into another prime (420351823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210175761 + 210175762.

It is an arithmetic number, because the mean of its divisors is an integer number (210175762).

Almost surely, 2^420351523 is an apocalyptic number.

420351523 is a deficient number, since it is larger than the sum of its proper divisors (1).

420351523 is an equidigital number, since it uses as much as digits as its factorization.

420351523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 420351523 is about 20502.4760212029. The cubic root of 420351523 is about 749.0961098960.

The spelling of 420351523 in words is "four hundred twenty million, three hundred fifty-one thousand, five hundred twenty-three".