159725109 has 8 divisors (see below), whose sum is σ = 213285952. Its totient is φ = 106323840.

The previous prime is 159725107. The next prime is 159725173. The reversal of 159725109 is 901527951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 159725109 - 2¹ = 159725107 is a prime.

It is a super-2 number, since 2×159725109² = 51024220890123762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159725107) 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 7 ways as a sum of consecutive naturals, for example, 37537 + ... + 41574.

It is an arithmetic number, because the mean of its divisors is an integer number (26660744).

Almost surely, 2^159725109 is an apocalyptic number.

It is an amenable number.

159725109 is a deficient number, since it is larger than the sum of its proper divisors (53560843).

159725109 is an equidigital number, since it uses as much as digits as its factorization.

159725109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79787.

The product of its (nonzero) digits is 28350, while the sum is 39.

The square root of 159725109 is about 12638.2399486637. The cubic root of 159725109 is about 542.5724413587.

The spelling of 159725109 in words is "one hundred fifty-nine million, seven hundred twenty-five thousand, one hundred nine".