109638487 has 4 divisors (see below), whose sum is σ = 125301136. Its totient is φ = 93975840.

The previous prime is 109638479. The next prime is 109638499. The reversal of 109638487 is 784836901.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 109638487 - 2³ = 109638479 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 (109638427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7831314 + ... + 7831327.

It is an arithmetic number, because the mean of its divisors is an integer number (31325284).

Almost surely, 2^109638487 is an apocalyptic number.

109638487 is a deficient number, since it is larger than the sum of its proper divisors (15662649).

109638487 is an equidigital number, since it uses as much as digits as its factorization.

109638487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15662648.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 109638487 is about 10470.8398421521. The cubic root of 109638487 is about 478.6165124910.

The spelling of 109638487 in words is "one hundred nine million, six hundred thirty-eight thousand, four hundred eighty-seven".