71612393 has 2 divisors, whose sum is σ = 71612394. Its totient is φ = 71612392.

The previous prime is 71612389. The next prime is 71612399. The reversal of 71612393 is 39321617.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57714409 + 13897984 = 7597^2 + 3728^2 .

It is an emirp because it is prime and its reverse (39321617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71612393 - 2² = 71612389 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71612399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35806196 + 35806197.

It is an arithmetic number, because the mean of its divisors is an integer number (35806197).

Almost surely, 2^71612393 is an apocalyptic number.

It is an amenable number.

71612393 is a deficient number, since it is larger than the sum of its proper divisors (1).

71612393 is an equidigital number, since it uses as much as digits as its factorization.

71612393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 32.

The square root of 71612393 is about 8462.4105903696. The cubic root of 71612393 is about 415.2688885001.

The spelling of 71612393 in words is "seventy-one million, six hundred twelve thousand, three hundred ninety-three".