913421 has 2 divisors, whose sum is σ = 913422. Its totient is φ = 913420.

The previous prime is 913417. The next prime is 913433. The reversal of 913421 is 124319.

913421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 570025 + 343396 = 755^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 913421 - 2² = 913417 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 913393 and 913402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (913441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456710 + 456711.

It is an arithmetic number, because the mean of its divisors is an integer number (456711).

2⁹¹³⁴²¹ is an apocalyptic number.

It is an amenable number.

913421 is a deficient number, since it is larger than the sum of its proper divisors (1).

913421 is an equidigital number, since it uses as much as digits as its factorization.

913421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 20.

The square root of 913421 is about 955.7306105802. The cubic root of 913421 is about 97.0264922148.

The spelling of 913421 in words is "nine hundred thirteen thousand, four hundred twenty-one".