75576749 has 2 divisors, whose sum is σ = 75576750. Its totient is φ = 75576748.

The previous prime is 75576727. The next prime is 75576793. The reversal of 75576749 is 94767557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53655625 + 21921124 = 7325^2 + 4682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75576749 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 75576697 and 75576706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75576719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37788374 + 37788375.

It is an arithmetic number, because the mean of its divisors is an integer number (37788375).

Almost surely, 2^75576749 is an apocalyptic number.

It is an amenable number.

75576749 is a deficient number, since it is larger than the sum of its proper divisors (1).

75576749 is an equidigital number, since it uses as much as digits as its factorization.

75576749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1852200, while the sum is 50.

The square root of 75576749 is about 8693.4888853670. The cubic root of 75576749 is about 422.7945711345.

The spelling of 75576749 in words is "seventy-five million, five hundred seventy-six thousand, seven hundred forty-nine".