420023057 has 2 divisors, whose sum is σ = 420023058. Its totient is φ = 420023056.

The previous prime is 420023017. The next prime is 420023083. The reversal of 420023057 is 750320024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419389441 + 633616 = 20479^2 + 796^2 .

It is a cyclic number.

It is not a de Polignac number, because 420023057 - 2¹² = 420018961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420023017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210011528 + 210011529.

It is an arithmetic number, because the mean of its divisors is an integer number (210011529).

Almost surely, 2^420023057 is an apocalyptic number.

It is an amenable number.

420023057 is a deficient number, since it is larger than the sum of its proper divisors (1).

420023057 is an equidigital number, since it uses as much as digits as its factorization.

420023057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 420023057 is about 20494.4640573985. The cubic root of 420023057 is about 748.9009425132.

The spelling of 420023057 in words is "four hundred twenty million, twenty-three thousand, fifty-seven".