7575757949 has 2 divisors, whose sum is σ = 7575757950. Its totient is φ = 7575757948.

The previous prime is 7575757927. The next prime is 7575757993. The reversal of 7575757949 is 9497575757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6077293849 + 1498464100 = 77957^2 + 38710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7575757949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7575757249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3787878974 + 3787878975.

It is an arithmetic number, because the mean of its divisors is an integer number (3787878975).

Almost surely, 2^7575757949 is an apocalyptic number.

It is an amenable number.

7575757949 is a deficient number, since it is larger than the sum of its proper divisors (1).

7575757949 is an equidigital number, since it uses as much as digits as its factorization.

7575757949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97240500, while the sum is 65.

The square root of 7575757949 is about 87038.8301219634. The cubic root of 7575757949 is about 1964.0024719358.

The spelling of 7575757949 in words is "seven billion, five hundred seventy-five million, seven hundred fifty-seven thousand, nine hundred forty-nine".