75858749 has 2 divisors, whose sum is σ = 75858750. Its totient is φ = 75858748.

The previous prime is 75858703. The next prime is 75858781. The reversal of 75858749 is 94785857.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67535524 + 8323225 = 8218^2 + 2885^2 .

It is an emirp because it is prime and its reverse (94785857) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75858749 - 2²⁰ = 74810173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75858749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75858449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37929374 + 37929375.

It is an arithmetic number, because the mean of its divisors is an integer number (37929375).

Almost surely, 2^75858749 is an apocalyptic number.

It is an amenable number.

75858749 is a deficient number, since it is larger than the sum of its proper divisors (1).

75858749 is an equidigital number, since it uses as much as digits as its factorization.

75858749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2822400, while the sum is 53.

The square root of 75858749 is about 8709.6928189231. The cubic root of 75858749 is about 423.3197771232.

The spelling of 75858749 in words is "seventy-five million, eight hundred fifty-eight thousand, seven hundred forty-nine".