109139492 has 96 divisors (see below), whose sum is σ = 250150656. Its totient is φ = 40435200.

The previous prime is 109139491. The next prime is 109139497. The reversal of 109139492 is 294931901.

It is a super-2 number, since 2×109139492² = 23822857428036128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (109139491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 695078 + ... + 695234.

It is an arithmetic number, because the mean of its divisors is an integer number (2605736).

Almost surely, 2^109139492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109139492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125075328).

109139492 is an abundant number, since it is smaller than the sum of its proper divisors (141011164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109139492 is a wasteful number, since it uses less digits than its factorization.

109139492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 109139492 is about 10446.9848281693. The cubic root of 109139492 is about 477.8893028678.

The spelling of 109139492 in words is "one hundred nine million, one hundred thirty-nine thousand, four hundred ninety-two".