75440641 has 2 divisors, whose sum is σ = 75440642. Its totient is φ = 75440640.

The previous prime is 75440623. The next prime is 75440647. The reversal of 75440641 is 14604457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75325041 + 115600 = 8679^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 75440641 - 2¹⁹ = 74916353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75440647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37720320 + 37720321.

It is an arithmetic number, because the mean of its divisors is an integer number (37720321).

Almost surely, 2^75440641 is an apocalyptic number.

It is an amenable number.

75440641 is a deficient number, since it is larger than the sum of its proper divisors (1).

75440641 is an equidigital number, since it uses as much as digits as its factorization.

75440641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 75440641 is about 8685.6572002353. The cubic root of 75440641 is about 422.5406116209.

The spelling of 75440641 in words is "seventy-five million, four hundred forty thousand, six hundred forty-one".