75272971 has 2 divisors, whose sum is σ = 75272972. Its totient is φ = 75272970.

The previous prime is 75272969. The next prime is 75272999. The reversal of 75272971 is 17927257.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75272971 - 2¹ = 75272969 is a prime.

Together with 75272969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (75272671) 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, 37636485 + 37636486.

It is an arithmetic number, because the mean of its divisors is an integer number (37636486).

Almost surely, 2^75272971 is an apocalyptic number.

75272971 is a deficient number, since it is larger than the sum of its proper divisors (1).

75272971 is an equidigital number, since it uses as much as digits as its factorization.

75272971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61740, while the sum is 40.

The square root of 75272971 is about 8675.9997118488. Note that the first 3 decimals coincide. The cubic root of 75272971 is about 422.2273413225.

The spelling of 75272971 in words is "seventy-five million, two hundred seventy-two thousand, nine hundred seventy-one".