36697181 has 2 divisors, whose sum is σ = 36697182. Its totient is φ = 36697180.

The previous prime is 36697163. The next prime is 36697187. The reversal of 36697181 is 18179663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27994681 + 8702500 = 5291^2 + 2950^2 .

It is an emirp because it is prime and its reverse (18179663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36697181 - 2⁶ = 36697117 is a prime.

It is a super-2 number, since 2×36697181² = 2693366186693522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36697187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18348590 + 18348591.

It is an arithmetic number, because the mean of its divisors is an integer number (18348591).

Almost surely, 2^36697181 is an apocalyptic number.

It is an amenable number.

36697181 is a deficient number, since it is larger than the sum of its proper divisors (1).

36697181 is an equidigital number, since it uses as much as digits as its factorization.

36697181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 36697181 is about 6057.8198223453. The cubic root of 36697181 is about 332.3106306690.

The spelling of 36697181 in words is "thirty-six million, six hundred ninety-seven thousand, one hundred eighty-one".