36855109 has 2 divisors, whose sum is σ = 36855110. Its totient is φ = 36855108.

The previous prime is 36855107. The next prime is 36855121. The reversal of 36855109 is 90155863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36360900 + 494209 = 6030^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 36855109 - 2¹ = 36855107 is a prime.

Together with 36855107, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36855101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18427554 + 18427555.

It is an arithmetic number, because the mean of its divisors is an integer number (18427555).

Almost surely, 2^36855109 is an apocalyptic number.

It is an amenable number.

36855109 is a deficient number, since it is larger than the sum of its proper divisors (1).

36855109 is an equidigital number, since it uses as much as digits as its factorization.

36855109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 36855109 is about 6070.8408808006. The cubic root of 36855109 is about 332.7866531346.

It can be divided in two parts, 36855 and 109, that multiplied together give a triangular number (4017195 = T₂₈₃₄).

The spelling of 36855109 in words is "thirty-six million, eight hundred fifty-five thousand, one hundred nine".