672243073 has 2 divisors, whose sum is σ = 672243074. Its totient is φ = 672243072.

The previous prime is 672243049. The next prime is 672243079. The reversal of 672243073 is 370342276.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461906064 + 210337009 = 21492^2 + 14503^2 .

It is a cyclic number.

It is not a de Polignac number, because 672243073 - 2²¹ = 670145921 is a prime.

It is not a weakly prime, because it can be changed into another prime (672243079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336121536 + 336121537.

It is an arithmetic number, because the mean of its divisors is an integer number (336121537).

Almost surely, 2^672243073 is an apocalyptic number.

It is an amenable number.

672243073 is a deficient number, since it is larger than the sum of its proper divisors (1).

672243073 is an equidigital number, since it uses as much as digits as its factorization.

672243073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 34.

The square root of 672243073 is about 25927.6507420167. The cubic root of 672243073 is about 876.0094246569.

The spelling of 672243073 in words is "six hundred seventy-two million, two hundred forty-three thousand, seventy-three".