36623381 has 2 divisors, whose sum is σ = 36623382. Its totient is φ = 36623380.

The previous prime is 36623357. The next prime is 36623407. The reversal of 36623381 is 18332663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35593156 + 1030225 = 5966^2 + 1015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36623381 is a prime.

It is a super-2 number, since 2×36623381² = 2682544071742322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36623311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18311690 + 18311691.

It is an arithmetic number, because the mean of its divisors is an integer number (18311691).

Almost surely, 2^36623381 is an apocalyptic number.

It is an amenable number.

36623381 is a deficient number, since it is larger than the sum of its proper divisors (1).

36623381 is an equidigital number, since it uses as much as digits as its factorization.

36623381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 32.

The square root of 36623381 is about 6051.7254564298. The cubic root of 36623381 is about 332.0877163351.

The spelling of 36623381 in words is "thirty-six million, six hundred twenty-three thousand, three hundred eighty-one".