421132913 has 2 divisors, whose sum is σ = 421132914. Its totient is φ = 421132912.

The previous prime is 421132903. The next prime is 421132937. The reversal of 421132913 is 319231124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280663009 + 140469904 = 16753^2 + 11852^2 .

It is a cyclic number.

It is not a de Polignac number, because 421132913 - 2⁶ = 421132849 is a prime.

It is not a weakly prime, because it can be changed into another prime (421132903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210566456 + 210566457.

It is an arithmetic number, because the mean of its divisors is an integer number (210566457).

Almost surely, 2^421132913 is an apocalyptic number.

It is an amenable number.

421132913 is a deficient number, since it is larger than the sum of its proper divisors (1).

421132913 is an equidigital number, since it uses as much as digits as its factorization.

421132913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 421132913 is about 20521.5231647166. The cubic root of 421132913 is about 749.5599866422.

The spelling of 421132913 in words is "four hundred twenty-one million, one hundred thirty-two thousand, nine hundred thirteen".