109437861 has 32 divisors (see below), whose sum is σ = 161280000. Its totient is φ = 65596608.

The previous prime is 109437821. The next prime is 109437863. The reversal of 109437861 is 168734901.

It is not a de Polignac number, because 109437861 - 2¹¹ = 109435813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109437863) 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, 457780 + ... + 458018.

It is an arithmetic number, because the mean of its divisors is an integer number (5040000).

Almost surely, 2^109437861 is an apocalyptic number.

It is an amenable number.

109437861 is a deficient number, since it is larger than the sum of its proper divisors (51842139).

109437861 is a wasteful number, since it uses less digits than its factorization.

109437861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 109437861 is about 10461.2552306117. The cubic root of 109437861 is about 478.3243962551.

The spelling of 109437861 in words is "one hundred nine million, four hundred thirty-seven thousand, eight hundred sixty-one".