75809977 has 2 divisors, whose sum is σ = 75809978. Its totient is φ = 75809976.

The previous prime is 75809969. The next prime is 75810017. The reversal of 75809977 is 77990857.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42042256 + 33767721 = 6484^2 + 5811^2 .

It is a cyclic number.

It is not a de Polignac number, because 75809977 - 2³ = 75809969 is a prime.

It is a super-2 number, since 2×75809977² = 11494305225481058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75809917) 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, 37904988 + 37904989.

It is an arithmetic number, because the mean of its divisors is an integer number (37904989).

Almost surely, 2^75809977 is an apocalyptic number.

It is an amenable number.

75809977 is a deficient number, since it is larger than the sum of its proper divisors (1).

75809977 is an equidigital number, since it uses as much as digits as its factorization.

75809977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The square root of 75809977 is about 8706.8924996235. The cubic root of 75809977 is about 423.2290357620.

The spelling of 75809977 in words is "seventy-five million, eight hundred nine thousand, nine hundred seventy-seven".