109856397 has 32 divisors (see below), whose sum is σ = 178716672. Its totient is φ = 58593024.

The previous prime is 109856377. The next prime is 109856399. The reversal of 109856397 is 793658901.

It is not a de Polignac number, because 109856397 - 2¹⁰ = 109855373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109856399) 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, 44128 + ... + 46550.

It is an arithmetic number, because the mean of its divisors is an integer number (5584896).

Almost surely, 2^109856397 is an apocalyptic number.

109856397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

109856397 is a deficient number, since it is larger than the sum of its proper divisors (68860275).

109856397 is a wasteful number, since it uses less digits than its factorization.

109856397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 109856397 is about 10481.2402414981. The cubic root of 109856397 is about 478.9333911909.

The spelling of 109856397 in words is "one hundred nine million, eight hundred fifty-six thousand, three hundred ninety-seven".