109619138 has 16 divisors (see below), whose sum is σ = 166580280. Its totient is φ = 54096000.

The previous prime is 109619137. The next prime is 109619141. The reversal of 109619138 is 831916901.

It can be written as a sum of positive squares in 4 ways, for example, as 100661089 + 8958049 = 10033^2 + 2993^2 .

It is not an unprimeable number, because it can be changed into a prime (109619137) 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, 84398 + ... + 85686.

Almost surely, 2^109619138 is an apocalyptic number.

109619138 is a deficient number, since it is larger than the sum of its proper divisors (56961142).

109619138 is a wasteful number, since it uses less digits than its factorization.

109619138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 109619138 is about 10469.9158544852. The cubic root of 109619138 is about 478.5883554208.

The spelling of 109619138 in words is "one hundred nine million, six hundred nineteen thousand, one hundred thirty-eight".