109991372 has 6 divisors (see below), whose sum is σ = 192484908. Its totient is φ = 54995684.

The previous prime is 109991341. The next prime is 109991381. The reversal of 109991372 is 273199901.

It is a super-3 number, since 3×109991372³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13748918 + ... + 13748925.

It is an arithmetic number, because the mean of its divisors is an integer number (32080818).

Almost surely, 2^109991372 is an apocalyptic number.

It is an amenable number.

109991372 is a deficient number, since it is larger than the sum of its proper divisors (82493536).

109991372 is a wasteful number, since it uses less digits than its factorization.

109991372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27497847 (or 27497845 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 109991372 is about 10487.6771498745. The cubic root of 109991372 is about 479.1294579937.

The spelling of 109991372 in words is "one hundred nine million, nine hundred ninety-one thousand, three hundred seventy-two".