75495557 has 2 divisors, whose sum is σ = 75495558. Its totient is φ = 75495556.

The previous prime is 75495551. The next prime is 75495587. The reversal of 75495557 is 75559457.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39866596 + 35628961 = 6314^2 + 5969^2 .

It is an emirp because it is prime and its reverse (75559457) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75495557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75495551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37747778 + 37747779.

It is an arithmetic number, because the mean of its divisors is an integer number (37747779).

Almost surely, 2^75495557 is an apocalyptic number.

It is an amenable number.

75495557 is a deficient number, since it is larger than the sum of its proper divisors (1).

75495557 is an equidigital number, since it uses as much as digits as its factorization.

75495557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102500, while the sum is 47.

The square root of 75495557 is about 8688.8179288094. The cubic root of 75495557 is about 422.6431143382.

The spelling of 75495557 in words is "seventy-five million, four hundred ninety-five thousand, five hundred fifty-seven".