75146381 has 2 divisors, whose sum is σ = 75146382. Its totient is φ = 75146380.

The previous prime is 75146339. The next prime is 75146389. The reversal of 75146381 is 18364157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74978281 + 168100 = 8659^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 75146381 - 2¹⁴ = 75129997 is a prime.

It is a super-2 number, since 2×75146381² = 11293957154794322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75146389) 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, 37573190 + 37573191.

It is an arithmetic number, because the mean of its divisors is an integer number (37573191).

Almost surely, 2^75146381 is an apocalyptic number.

It is an amenable number.

75146381 is a deficient number, since it is larger than the sum of its proper divisors (1).

75146381 is an equidigital number, since it uses as much as digits as its factorization.

75146381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 75146381 is about 8668.7012291346. The cubic root of 75146381 is about 421.9905154985.

The spelling of 75146381 in words is "seventy-five million, one hundred forty-six thousand, three hundred eighty-one".