1623161537 has 2 divisors, whose sum is σ = 1623161538. Its totient is φ = 1623161536.

The previous prime is 1623161531. The next prime is 1623161539. The reversal of 1623161537 is 7351613261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1224720016 + 398441521 = 34996^2 + 19961^2 .

It is a cyclic number.

It is not a de Polignac number, because 1623161537 - 2⁴ = 1623161521 is a prime.

Together with 1623161539, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1623161497 and 1623161506.

It is not a weakly prime, because it can be changed into another prime (1623161531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811580768 + 811580769.

It is an arithmetic number, because the mean of its divisors is an integer number (811580769).

Almost surely, 2^1623161537 is an apocalyptic number.

It is an amenable number.

1623161537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623161537 is an equidigital number, since it uses as much as digits as its factorization.

1623161537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 35.

The square root of 1623161537 is about 40288.4789611124. The cubic root of 1623161537 is about 1175.2238081596.

Adding to 1623161537 its reverse (7351613261), we get a palindrome (8974774798).

The spelling of 1623161537 in words is "one billion, six hundred twenty-three million, one hundred sixty-one thousand, five hundred thirty-seven".