75977389 has 2 divisors, whose sum is σ = 75977390. Its totient is φ = 75977388.

The previous prime is 75977359. The next prime is 75977393. The reversal of 75977389 is 98377957.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67322025 + 8655364 = 8205^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 75977389 - 2¹³ = 75969197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75977359) 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, 37988694 + 37988695.

It is an arithmetic number, because the mean of its divisors is an integer number (37988695).

Almost surely, 2^75977389 is an apocalyptic number.

It is an amenable number.

75977389 is a deficient number, since it is larger than the sum of its proper divisors (1).

75977389 is an equidigital number, since it uses as much as digits as its factorization.

75977389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3333960, while the sum is 55.

The square root of 75977389 is about 8716.5009608214. The cubic root of 75977389 is about 423.5403471506.

The spelling of 75977389 in words is "seventy-five million, nine hundred seventy-seven thousand, three hundred eighty-nine".