71423161 has 2 divisors, whose sum is σ = 71423162. Its totient is φ = 71423160.

The previous prime is 71423153. The next prime is 71423167. The reversal of 71423161 is 16132417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66928761 + 4494400 = 8181^2 + 2120^2 .

It is a cyclic number.

It is not a de Polignac number, because 71423161 - 2³ = 71423153 is a prime.

It is a super-3 number, since 3×71423161³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (71423167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35711580 + 35711581.

It is an arithmetic number, because the mean of its divisors is an integer number (35711581).

Almost surely, 2^71423161 is an apocalyptic number.

It is an amenable number.

71423161 is a deficient number, since it is larger than the sum of its proper divisors (1).

71423161 is an equidigital number, since it uses as much as digits as its factorization.

71423161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 71423161 is about 8451.2224559527. Note that the first 3 decimals coincide. The cubic root of 71423161 is about 414.9027904118.

Adding to 71423161 its reverse (16132417), we get a palindrome (87555578).

The spelling of 71423161 in words is "seventy-one million, four hundred twenty-three thousand, one hundred sixty-one".