672031601 has 2 divisors, whose sum is σ = 672031602. Its totient is φ = 672031600.

The previous prime is 672031567. The next prime is 672031603. The reversal of 672031601 is 106130276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 580810000 + 91221601 = 24100^2 + 9551^2 .

It is a cyclic number.

It is not a de Polignac number, because 672031601 - 2⁶ = 672031537 is a prime.

Together with 672031603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (672031603) 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, 336015800 + 336015801.

It is an arithmetic number, because the mean of its divisors is an integer number (336015801).

Almost surely, 2^672031601 is an apocalyptic number.

It is an amenable number.

672031601 is a deficient number, since it is larger than the sum of its proper divisors (1).

672031601 is an equidigital number, since it uses as much as digits as its factorization.

672031601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 672031601 is about 25923.5723039862. The cubic root of 672031601 is about 875.9175576418.

Adding to 672031601 its reverse (106130276), we get a palindrome (778161877).

The spelling of 672031601 in words is "six hundred seventy-two million, thirty-one thousand, six hundred one".