8161537 has 2 divisors, whose sum is σ = 8161538. Its totient is φ = 8161536.

The previous prime is 8161519. The next prime is 8161579. The reversal of 8161537 is 7351618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7750656 + 410881 = 2784^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 8161537 - 2¹⁹ = 7637249 is a prime.

It is a super-2 number, since 2×8161537² = 133221372404738, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8161499 and 8161508.

It is not a weakly prime, because it can be changed into another prime (8161837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4080768 + 4080769.

It is an arithmetic number, because the mean of its divisors is an integer number (4080769).

Almost surely, 2^8161537 is an apocalyptic number.

It is an amenable number.

8161537 is a deficient number, since it is larger than the sum of its proper divisors (1).

8161537 is an equidigital number, since it uses as much as digits as its factorization.

8161537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 8161537 is about 2856.8403875611. The cubic root of 8161537 is about 201.3371814706.

The spelling of 8161537 in words is "eight million, one hundred sixty-one thousand, five hundred thirty-seven".