421367957 has 2 divisors, whose sum is σ = 421367958. Its totient is φ = 421367956.

The previous prime is 421367929. The next prime is 421368041. The reversal of 421367957 is 759763124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 413268241 + 8099716 = 20329^2 + 2846^2 .

It is a cyclic number.

It is not a de Polignac number, because 421367957 - 2¹² = 421363861 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 (421367257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210683978 + 210683979.

It is an arithmetic number, because the mean of its divisors is an integer number (210683979).

Almost surely, 2^421367957 is an apocalyptic number.

It is an amenable number.

421367957 is a deficient number, since it is larger than the sum of its proper divisors (1).

421367957 is an equidigital number, since it uses as much as digits as its factorization.

421367957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 44.

The square root of 421367957 is about 20527.2491337734. The cubic root of 421367957 is about 749.6994096174.

The spelling of 421367957 in words is "four hundred twenty-one million, three hundred sixty-seven thousand, nine hundred fifty-seven".