109487 has 4 divisors (see below), whose sum is σ = 125136. Its totient is φ = 93840.

The previous prime is 109481. The next prime is 109507. The reversal of 109487 is 784901.

109487 = T₁₁₈ + T₁₁₉ + ... + T₁₃₁.

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

It is a cyclic number.

It is not a de Polignac number, because 109487 - 2⁴ = 109471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 109487.

It is not an unprimeable number, because it can be changed into a prime (109481) 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, 7814 + ... + 7827.

It is an arithmetic number, because the mean of its divisors is an integer number (31284).

2¹⁰⁹⁴⁸⁷ is an apocalyptic number.

109487 is a deficient number, since it is larger than the sum of its proper divisors (15649).

109487 is an equidigital number, since it uses as much as digits as its factorization.

109487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15648.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 109487 is about 330.8881986412. Note that the first 3 decimals coincide. The cubic root of 109487 is about 47.8395976801.

It can be divided in two parts, 10948 and 7, that multiplied together give a triangular number (76636 = T₃₉₁).

The spelling of 109487 in words is "one hundred nine thousand, four hundred eighty-seven".