421313797 has 2 divisors, whose sum is σ = 421313798. Its totient is φ = 421313796.

The previous prime is 421313759. The next prime is 421313803. The reversal of 421313797 is 797313124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366760801 + 54552996 = 19151^2 + 7386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421313797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421313897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210656898 + 210656899.

It is an arithmetic number, because the mean of its divisors is an integer number (210656899).

Almost surely, 2^421313797 is an apocalyptic number.

It is an amenable number.

421313797 is a deficient number, since it is larger than the sum of its proper divisors (1).

421313797 is an equidigital number, since it uses as much as digits as its factorization.

421313797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 37.

The square root of 421313797 is about 20525.9298693141. The cubic root of 421313797 is about 749.6672876844.

The spelling of 421313797 in words is "four hundred twenty-one million, three hundred thirteen thousand, seven hundred ninety-seven".