161792537 has 4 divisors (see below), whose sum is σ = 167371620. Its totient is φ = 156213456.

The previous prime is 161792513. The next prime is 161792563. The reversal of 161792537 is 735297161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 735297161 = 79 ⋅9307559.

It can be written as a sum of positive squares in 2 ways, for example, as 139334416 + 22458121 = 11804^2 + 4739^2 .

It is a cyclic number.

It is not a de Polignac number, because 161792537 - 2⁶ = 161792473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161792494 and 161792503.

It is not an unprimeable number, because it can be changed into a prime (161792507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2789498 + ... + 2789555.

It is an arithmetic number, because the mean of its divisors is an integer number (41842905).

Almost surely, 2^161792537 is an apocalyptic number.

It is an amenable number.

161792537 is a deficient number, since it is larger than the sum of its proper divisors (5579083).

161792537 is an equidigital number, since it uses as much as digits as its factorization.

161792537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579082.

The product of its digits is 79380, while the sum is 41.

The square root of 161792537 is about 12719.7695340757. The cubic root of 161792537 is about 544.9033714724.

The spelling of 161792537 in words is "one hundred sixty-one million, seven hundred ninety-two thousand, five hundred thirty-seven".