157988109 has 8 divisors (see below), whose sum is σ = 214104352. Its totient is φ = 103598640.

The previous prime is 157988107. The next prime is 157988119. The reversal of 157988109 is 901889751.

157988109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 157988109 - 2¹ = 157988107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157988107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431479 + ... + 431844.

It is an arithmetic number, because the mean of its divisors is an integer number (26763044).

Almost surely, 2^157988109 is an apocalyptic number.

It is an amenable number.

157988109 is a deficient number, since it is larger than the sum of its proper divisors (56116243).

157988109 is an equidigital number, since it uses as much as digits as its factorization.

157988109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863387.

The product of its (nonzero) digits is 181440, while the sum is 48.

The square root of 157988109 is about 12569.3320824935. The cubic root of 157988109 is about 540.5984551725.

The spelling of 157988109 in words is "one hundred fifty-seven million, nine hundred eighty-eight thousand, one hundred nine".