75990427 has 2 divisors, whose sum is σ = 75990428. Its totient is φ = 75990426.

The previous prime is 75990419. The next prime is 75990457. The reversal of 75990427 is 72409957.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75990427 - 2³ = 75990419 is a prime.

It is not a weakly prime, because it can be changed into another prime (75990457) 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, 37995213 + 37995214.

It is an arithmetic number, because the mean of its divisors is an integer number (37995214).

Almost surely, 2^75990427 is an apocalyptic number.

75990427 is a deficient number, since it is larger than the sum of its proper divisors (1).

75990427 is an equidigital number, since it uses as much as digits as its factorization.

75990427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 75990427 is about 8717.2488205855. The cubic root of 75990427 is about 423.5645727931.

The spelling of 75990427 in words is "seventy-five million, nine hundred ninety thousand, four hundred twenty-seven".