673525421 has 2 divisors, whose sum is σ = 673525422. Its totient is φ = 673525420.

The previous prime is 673525367. The next prime is 673525429. The reversal of 673525421 is 124525376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 590004100 + 83521321 = 24290^2 + 9139^2 .

It is a cyclic number.

It is not a de Polignac number, because 673525421 - 2¹⁴ = 673509037 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 (673525429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336762710 + 336762711.

It is an arithmetic number, because the mean of its divisors is an integer number (336762711).

Almost surely, 2^673525421 is an apocalyptic number.

It is an amenable number.

673525421 is a deficient number, since it is larger than the sum of its proper divisors (1).

673525421 is an equidigital number, since it uses as much as digits as its factorization.

673525421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 35.

The square root of 673525421 is about 25952.3683119672. The cubic root of 673525421 is about 876.5660861025.

The spelling of 673525421 in words is "six hundred seventy-three million, five hundred twenty-five thousand, four hundred twenty-one".