161587437 has 16 divisors (see below), whose sum is σ = 240770880. Its totient is φ = 95542400.

The previous prime is 161587429. The next prime is 161587483. The reversal of 161587437 is 734785161.

It is a cyclic number.

It is not a de Polignac number, because 161587437 - 2³ = 161587429 is a prime.

It is a super-2 number, since 2×161587437² = 52220999592457938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161587427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58362 + ... + 61067.

It is an arithmetic number, because the mean of its divisors is an integer number (15048180).

Almost surely, 2^161587437 is an apocalyptic number.

It is an amenable number.

161587437 is a deficient number, since it is larger than the sum of its proper divisors (79183443).

161587437 is a wasteful number, since it uses less digits than its factorization.

161587437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119484.

The product of its digits is 141120, while the sum is 42.

The square root of 161587437 is about 12711.7047243869. The cubic root of 161587437 is about 544.6730210460.

The spelling of 161587437 in words is "one hundred sixty-one million, five hundred eighty-seven thousand, four hundred thirty-seven".