451346813 has 2 divisors, whose sum is σ = 451346814. Its totient is φ = 451346812.

The previous prime is 451346803. The next prime is 451346879. The reversal of 451346813 is 318643154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 444492889 + 6853924 = 21083^2 + 2618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-451346813 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 (451346803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225673406 + 225673407.

It is an arithmetic number, because the mean of its divisors is an integer number (225673407).

Almost surely, 2^451346813 is an apocalyptic number.

It is an amenable number.

451346813 is a deficient number, since it is larger than the sum of its proper divisors (1).

451346813 is an equidigital number, since it uses as much as digits as its factorization.

451346813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 451346813 is about 21244.9244056080. The cubic root of 451346813 is about 767.0731713381.

Adding to 451346813 its reverse (318643154), we get a palindrome (769989967).

The spelling of 451346813 in words is "four hundred fifty-one million, three hundred forty-six thousand, eight hundred thirteen".