672042523 has 2 divisors, whose sum is σ = 672042524. Its totient is φ = 672042522.

The previous prime is 672042517. The next prime is 672042533. The reversal of 672042523 is 325240276.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672042523 is a prime.

It is not a weakly prime, because it can be changed into another prime (672042533) 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, 336021261 + 336021262.

It is an arithmetic number, because the mean of its divisors is an integer number (336021262).

Almost surely, 2^672042523 is an apocalyptic number.

672042523 is a deficient number, since it is larger than the sum of its proper divisors (1).

672042523 is an equidigital number, since it uses as much as digits as its factorization.

672042523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 672042523 is about 25923.7829608258. The cubic root of 672042523 is about 875.9223028153.

Adding to 672042523 its reverse (325240276), we get a palindrome (997282799).

The spelling of 672042523 in words is "six hundred seventy-two million, forty-two thousand, five hundred twenty-three".