420253357 has 2 divisors, whose sum is σ = 420253358. Its totient is φ = 420253356.

The previous prime is 420253333. The next prime is 420253387. The reversal of 420253357 is 753352024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409091076 + 11162281 = 20226^2 + 3341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420253357 is a prime.

It is a super-2 number, since 2×420253357² = 353225768139538898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420253387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210126678 + 210126679.

It is an arithmetic number, because the mean of its divisors is an integer number (210126679).

Almost surely, 2^420253357 is an apocalyptic number.

It is an amenable number.

420253357 is a deficient number, since it is larger than the sum of its proper divisors (1).

420253357 is an equidigital number, since it uses as much as digits as its factorization.

420253357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 31.

The square root of 420253357 is about 20500.0818778853. The cubic root of 420253357 is about 749.0377924404.

The spelling of 420253357 in words is "four hundred twenty million, two hundred fifty-three thousand, three hundred fifty-seven".