75855413 has 2 divisors, whose sum is σ = 75855414. Its totient is φ = 75855412.

The previous prime is 75855401. The next prime is 75855421. The reversal of 75855413 is 31455857.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67601284 + 8254129 = 8222^2 + 2873^2 .

It is a cyclic number.

It is not a de Polignac number, because 75855413 - 2¹² = 75851317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75855433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37927706 + 37927707.

It is an arithmetic number, because the mean of its divisors is an integer number (37927707).

Almost surely, 2^75855413 is an apocalyptic number.

It is an amenable number.

75855413 is a deficient number, since it is larger than the sum of its proper divisors (1).

75855413 is an equidigital number, since it uses as much as digits as its factorization.

75855413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 38.

The square root of 75855413 is about 8709.5013060450. The cubic root of 75855413 is about 423.3135716624.

The spelling of 75855413 in words is "seventy-five million, eight hundred fifty-five thousand, four hundred thirteen".