421026673 has 2 divisors, whose sum is σ = 421026674. Its totient is φ = 421026672.

The previous prime is 421026653. The next prime is 421026677. The reversal of 421026673 is 376620124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393903409 + 27123264 = 19847^2 + 5208^2 .

It is a cyclic number.

It is not a de Polignac number, because 421026673 - 2⁹ = 421026161 is a prime.

It is not a weakly prime, because it can be changed into another prime (421026677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210513336 + 210513337.

It is an arithmetic number, because the mean of its divisors is an integer number (210513337).

Almost surely, 2^421026673 is an apocalyptic number.

It is an amenable number.

421026673 is a deficient number, since it is larger than the sum of its proper divisors (1).

421026673 is an equidigital number, since it uses as much as digits as its factorization.

421026673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 421026673 is about 20518.9344996274. The cubic root of 421026673 is about 749.4969503672.

Adding to 421026673 its reverse (376620124), we get a palindrome (797646797).

The spelling of 421026673 in words is "four hundred twenty-one million, twenty-six thousand, six hundred seventy-three".