71351789 has 2 divisors, whose sum is σ = 71351790. Its totient is φ = 71351788.

The previous prime is 71351747. The next prime is 71351837. The reversal of 71351789 is 98715317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57229225 + 14122564 = 7565^2 + 3758^2 .

It is a cyclic number.

It is not a de Polignac number, because 71351789 - 2¹² = 71347693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71351719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35675894 + 35675895.

It is an arithmetic number, because the mean of its divisors is an integer number (35675895).

Almost surely, 2^71351789 is an apocalyptic number.

It is an amenable number.

71351789 is a deficient number, since it is larger than the sum of its proper divisors (1).

71351789 is an equidigital number, since it uses as much as digits as its factorization.

71351789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 41.

The square root of 71351789 is about 8446.9988161477. The cubic root of 71351789 is about 414.7645424879.

The spelling of 71351789 in words is "seventy-one million, three hundred fifty-one thousand, seven hundred eighty-nine".