672073537 has 2 divisors, whose sum is σ = 672073538. Its totient is φ = 672073536.

The previous prime is 672073487. The next prime is 672073541. The reversal of 672073537 is 735370276.

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., 606932496 + 65141041 = 24636^2 + 8071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672073537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 672073537.

It is not a weakly prime, because it can be changed into another prime (672074537) 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, 336036768 + 336036769.

It is an arithmetic number, because the mean of its divisors is an integer number (336036769).

Almost surely, 2^672073537 is an apocalyptic number.

It is an amenable number.

672073537 is a deficient number, since it is larger than the sum of its proper divisors (1).

672073537 is an equidigital number, since it uses as much as digits as its factorization.

672073537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 185220, while the sum is 40.

The square root of 672073537 is about 25924.3811305111. The cubic root of 672073537 is about 875.9357768816.

The spelling of 672073537 in words is "six hundred seventy-two million, seventy-three thousand, five hundred thirty-seven".