71345993 has 2 divisors, whose sum is σ = 71345994. Its totient is φ = 71345992.

The previous prime is 71345959. The next prime is 71346013. The reversal of 71345993 is 39954317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69422224 + 1923769 = 8332^2 + 1387^2 .

It is a cyclic number.

It is not a de Polignac number, because 71345993 - 2⁶ = 71345929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71345993.

It is not a weakly prime, because it can be changed into another prime (71341993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35672996 + 35672997.

It is an arithmetic number, because the mean of its divisors is an integer number (35672997).

Almost surely, 2^71345993 is an apocalyptic number.

It is an amenable number.

71345993 is a deficient number, since it is larger than the sum of its proper divisors (1).

71345993 is an equidigital number, since it uses as much as digits as its factorization.

71345993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 41.

The square root of 71345993 is about 8446.6557287485. The cubic root of 71345993 is about 414.7533115601.

The spelling of 71345993 in words is "seventy-one million, three hundred forty-five thousand, nine hundred ninety-three".