67572749 has 2 divisors, whose sum is σ = 67572750. Its totient is φ = 67572748.

The previous prime is 67572677. The next prime is 67572751. The reversal of 67572749 is 94727576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58828900 + 8743849 = 7670^2 + 2957^2 .

It is a cyclic number.

It is not a de Polignac number, because 67572749 - 2²⁴ = 50795533 is a prime.

Together with 67572751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67572779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33786374 + 33786375.

It is an arithmetic number, because the mean of its divisors is an integer number (33786375).

Almost surely, 2^67572749 is an apocalyptic number.

It is an amenable number.

67572749 is a deficient number, since it is larger than the sum of its proper divisors (1).

67572749 is an equidigital number, since it uses as much as digits as its factorization.

67572749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740880, while the sum is 47.

The square root of 67572749 is about 8220.2645334563. The cubic root of 67572749 is about 407.3088649094.

The spelling of 67572749 in words is "sixty-seven million, five hundred seventy-two thousand, seven hundred forty-nine".