71634169 has 2 divisors, whose sum is σ = 71634170. Its totient is φ = 71634168.

The previous prime is 71634133. The next prime is 71634181. The reversal of 71634169 is 96143617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64000000 + 7634169 = 8000^2 + 2763^2 .

It is a cyclic number.

It is not a de Polignac number, because 71634169 - 2⁷ = 71634041 is a prime.

It is a super-2 number, since 2×71634169² = 10262908336641122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71634869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35817084 + 35817085.

It is an arithmetic number, because the mean of its divisors is an integer number (35817085).

Almost surely, 2^71634169 is an apocalyptic number.

It is an amenable number.

71634169 is a deficient number, since it is larger than the sum of its proper divisors (1).

71634169 is an equidigital number, since it uses as much as digits as its factorization.

71634169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 71634169 is about 8463.6971235979. The cubic root of 71634169 is about 415.3109760890.

The spelling of 71634169 in words is "seventy-one million, six hundred thirty-four thousand, one hundred sixty-nine".