674521423 has 2 divisors, whose sum is σ = 674521424. Its totient is φ = 674521422.

The previous prime is 674521417. The next prime is 674521447. The reversal of 674521423 is 324125476.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 674521423 - 2²¹ = 672424271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674521403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337260711 + 337260712.

It is an arithmetic number, because the mean of its divisors is an integer number (337260712).

Almost surely, 2^674521423 is an apocalyptic number.

674521423 is a deficient number, since it is larger than the sum of its proper divisors (1).

674521423 is an equidigital number, since it uses as much as digits as its factorization.

674521423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 34.

The square root of 674521423 is about 25971.5502617768. The cubic root of 674521423 is about 876.9979587252.

Adding to 674521423 its reverse (324125476), we get a palindrome (998646899).

The spelling of 674521423 in words is "six hundred seventy-four million, five hundred twenty-one thousand, four hundred twenty-three".