71144999 has 2 divisors, whose sum is σ = 71145000. Its totient is φ = 71144998.

The previous prime is 71144959. The next prime is 71145013. The reversal of 71144999 is 99944117.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71144999 is a prime.

It is a super-2 number, since 2×71144999² = 10123221765420002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71144929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35572499 + 35572500.

It is an arithmetic number, because the mean of its divisors is an integer number (35572500).

Almost surely, 2^71144999 is an apocalyptic number.

71144999 is a deficient number, since it is larger than the sum of its proper divisors (1).

71144999 is an equidigital number, since it uses as much as digits as its factorization.

71144999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 71144999 is about 8434.7494924271. The cubic root of 71144999 is about 414.3634679779.

The spelling of 71144999 in words is "seventy-one million, one hundred forty-four thousand, nine hundred ninety-nine".