71751149 has 2 divisors, whose sum is σ = 71751150. Its totient is φ = 71751148.

The previous prime is 71751091. The next prime is 71751179. The reversal of 71751149 is 94115717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45995524 + 25755625 = 6782^2 + 5075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71751149 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71751179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35875574 + 35875575.

It is an arithmetic number, because the mean of its divisors is an integer number (35875575).

Almost surely, 2^71751149 is an apocalyptic number.

It is an amenable number.

71751149 is a deficient number, since it is larger than the sum of its proper divisors (1).

71751149 is an equidigital number, since it uses as much as digits as its factorization.

71751149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 35.

The square root of 71751149 is about 8470.6049961027. The cubic root of 71751149 is about 415.5369234589.

The spelling of 71751149 in words is "seventy-one million, seven hundred fifty-one thousand, one hundred forty-nine".