75711749 has 2 divisors, whose sum is σ = 75711750. Its totient is φ = 75711748.

The previous prime is 75711743. The next prime is 75711763. The reversal of 75711749 is 94711757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74822500 + 889249 = 8650^2 + 943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75711749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75711743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37855874 + 37855875.

It is an arithmetic number, because the mean of its divisors is an integer number (37855875).

Almost surely, 2^75711749 is an apocalyptic number.

It is an amenable number.

75711749 is a deficient number, since it is larger than the sum of its proper divisors (1).

75711749 is an equidigital number, since it uses as much as digits as its factorization.

75711749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61740, while the sum is 41.

The square root of 75711749 is about 8701.2498527510. The cubic root of 75711749 is about 423.0461622501.

The spelling of 75711749 in words is "seventy-five million, seven hundred eleven thousand, seven hundred forty-nine".