75728879 has 2 divisors, whose sum is σ = 75728880. Its totient is φ = 75728878.

The previous prime is 75728867. The next prime is 75728881. The reversal of 75728879 is 97882757.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75728879 is a prime.

It is a super-2 number, since 2×75728879² = 11469726229193282, which contains 22 as substring.

Together with 75728881, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75728879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75728839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37864439 + 37864440.

It is an arithmetic number, because the mean of its divisors is an integer number (37864440).

Almost surely, 2^75728879 is an apocalyptic number.

75728879 is a deficient number, since it is larger than the sum of its proper divisors (1).

75728879 is an equidigital number, since it uses as much as digits as its factorization.

75728879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1975680, while the sum is 53.

The square root of 75728879 is about 8702.2341384268. The cubic root of 75728879 is about 423.0780649793.

The spelling of 75728879 in words is "seventy-five million, seven hundred twenty-eight thousand, eight hundred seventy-nine".