109139237 has 2 divisors, whose sum is σ = 109139238. Its totient is φ = 109139236.

The previous prime is 109139197. The next prime is 109139257. The reversal of 109139237 is 732931901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107516161 + 1623076 = 10369^2 + 1274^2 .

It is a cyclic number.

It is not a de Polignac number, because 109139237 - 2¹² = 109135141 is a prime.

It is a super-2 number, since 2×109139237² = 23822746105884338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 109139197 and 109139206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109139257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54569618 + 54569619.

It is an arithmetic number, because the mean of its divisors is an integer number (54569619).

Almost surely, 2^109139237 is an apocalyptic number.

It is an amenable number.

109139237 is a deficient number, since it is larger than the sum of its proper divisors (1).

109139237 is an equidigital number, since it uses as much as digits as its factorization.

109139237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 109139237 is about 10446.9726236839. The cubic root of 109139237 is about 477.8889306778. Note that the first 3 decimals are identical.

The spelling of 109139237 in words is "one hundred nine million, one hundred thirty-nine thousand, two hundred thirty-seven".