75129871 has 2 divisors, whose sum is σ = 75129872. Its totient is φ = 75129870.

The previous prime is 75129853. The next prime is 75129881. The reversal of 75129871 is 17892157.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75129871 - 2¹¹ = 75127823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75129881) 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, 37564935 + 37564936.

It is an arithmetic number, because the mean of its divisors is an integer number (37564936).

Almost surely, 2^75129871 is an apocalyptic number.

75129871 is a deficient number, since it is larger than the sum of its proper divisors (1).

75129871 is an equidigital number, since it uses as much as digits as its factorization.

75129871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 40.

The square root of 75129871 is about 8667.7489003778. The cubic root of 75129871 is about 421.9596088263.

The spelling of 75129871 in words is "seventy-five million, one hundred twenty-nine thousand, eight hundred seventy-one".