407421893 has 2 divisors, whose sum is σ = 407421894. Its totient is φ = 407421892.

The previous prime is 407421877. The next prime is 407421913. The reversal of 407421893 is 398124704.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264810529 + 142611364 = 16273^2 + 11942^2 .

It is a cyclic number.

It is not a de Polignac number, because 407421893 - 2⁴ = 407421877 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (407421823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203710946 + 203710947.

It is an arithmetic number, because the mean of its divisors is an integer number (203710947).

Almost surely, 2^407421893 is an apocalyptic number.

It is an amenable number.

407421893 is a deficient number, since it is larger than the sum of its proper divisors (1).

407421893 is an equidigital number, since it uses as much as digits as its factorization.

407421893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 407421893 is about 20184.6945233263. The cubic root of 407421893 is about 741.3354828440.

The spelling of 407421893 in words is "four hundred seven million, four hundred twenty-one thousand, eight hundred ninety-three".