71268749 has 2 divisors, whose sum is σ = 71268750. Its totient is φ = 71268748.

The previous prime is 71268719. The next prime is 71268751. The reversal of 71268749 is 94786217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50154724 + 21114025 = 7082^2 + 4595^2 .

It is an emirp because it is prime and its reverse (94786217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71268749 - 2¹⁶ = 71203213 is a prime.

Together with 71268751, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71268719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35634374 + 35634375.

It is an arithmetic number, because the mean of its divisors is an integer number (35634375).

Almost surely, 2^71268749 is an apocalyptic number.

It is an amenable number.

71268749 is a deficient number, since it is larger than the sum of its proper divisors (1).

71268749 is an equidigital number, since it uses as much as digits as its factorization.

71268749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 71268749 is about 8442.0820299260. The cubic root of 71268749 is about 414.6035775092.

The spelling of 71268749 in words is "seventy-one million, two hundred sixty-eight thousand, seven hundred forty-nine".