75878969 has 2 divisors, whose sum is σ = 75878970. Its totient is φ = 75878968.

The previous prime is 75878963. The next prime is 75878981. The reversal of 75878969 is 96987857.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70644025 + 5234944 = 8405^2 + 2288^2 .

It is an emirp because it is prime and its reverse (96987857) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75878969 - 2⁴ = 75878953 is a prime.

It is a super-2 number, since 2×75878969² = 11515235873005922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (75878963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37939484 + 37939485.

It is an arithmetic number, because the mean of its divisors is an integer number (37939485).

Almost surely, 2^75878969 is an apocalyptic number.

It is an amenable number.

75878969 is a deficient number, since it is larger than the sum of its proper divisors (1).

75878969 is an equidigital number, since it uses as much as digits as its factorization.

75878969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 59.

The square root of 75878969 is about 8710.8535173082. The cubic root of 75878969 is about 423.3573854660.

The spelling of 75878969 in words is "seventy-five million, eight hundred seventy-eight thousand, nine hundred sixty-nine".