75770087 has 2 divisors, whose sum is σ = 75770088. Its totient is φ = 75770086.

The previous prime is 75770077. The next prime is 75770089. The reversal of 75770087 is 78007757.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75770087 - 2¹⁰ = 75769063 is a prime.

It is a super-2 number, since 2×75770087² = 11482212167975138, which contains 22 as substring.

Together with 75770089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75770089) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37885043 + 37885044.

It is an arithmetic number, because the mean of its divisors is an integer number (37885044).

Almost surely, 2^75770087 is an apocalyptic number.

75770087 is a deficient number, since it is larger than the sum of its proper divisors (1).

75770087 is an equidigital number, since it uses as much as digits as its factorization.

75770087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96040, while the sum is 41.

The square root of 75770087 is about 8704.6014842726. The cubic root of 75770087 is about 423.1547906169.

Subtracting 75770087 from its reverse (78007757), we obtain a triangular number (2237670 = T₂₁₁₅).

The spelling of 75770087 in words is "seventy-five million, seven hundred seventy thousand, eighty-seven".