75448553 has 2 divisors, whose sum is σ = 75448554. Its totient is φ = 75448552.

The previous prime is 75448543. The next prime is 75448559. The reversal of 75448553 is 35584457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61669609 + 13778944 = 7853^2 + 3712^2 .

It is an emirp because it is prime and its reverse (35584457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75448553 - 2⁴ = 75448537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75448553.

It is not a weakly prime, because it can be changed into another prime (75448559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37724276 + 37724277.

It is an arithmetic number, because the mean of its divisors is an integer number (37724277).

Almost surely, 2^75448553 is an apocalyptic number.

It is an amenable number.

75448553 is a deficient number, since it is larger than the sum of its proper divisors (1).

75448553 is an equidigital number, since it uses as much as digits as its factorization.

75448553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 41.

The square root of 75448553 is about 8686.1126518138. The cubic root of 75448553 is about 422.5553827239. Note that the first 3 decimals are identical.

The spelling of 75448553 in words is "seventy-five million, four hundred forty-eight thousand, five hundred fifty-three".