109128723 has 16 divisors (see below), whose sum is σ = 167088000. Its totient is φ = 62657280.

The previous prime is 109128713. The next prime is 109128737. The reversal of 109128723 is 327821901.

It is not a de Polignac number, because 109128723 - 2¹⁶ = 109063187 is a prime.

It is a super-2 number, since 2×109128723² = 23818156367221458, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (109128703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86398 + ... + 87651.

It is an arithmetic number, because the mean of its divisors is an integer number (10443000).

Almost surely, 2^109128723 is an apocalyptic number.

109128723 is a deficient number, since it is larger than the sum of its proper divisors (57959277).

109128723 is a wasteful number, since it uses less digits than its factorization.

109128723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174082.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 109128723 is about 10446.4694035832. The cubic root of 109128723 is about 477.8735842705.

The spelling of 109128723 in words is "one hundred nine million, one hundred twenty-eight thousand, seven hundred twenty-three".