36622991 has 2 divisors, whose sum is σ = 36622992. Its totient is φ = 36622990.

The previous prime is 36622987. The next prime is 36623017. The reversal of 36622991 is 19922663.

It is a weak prime.

It is an emirp because it is prime and its reverse (19922663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36622991 - 2² = 36622987 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36622921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18311495 + 18311496.

It is an arithmetic number, because the mean of its divisors is an integer number (18311496).

Almost surely, 2^36622991 is an apocalyptic number.

36622991 is a deficient number, since it is larger than the sum of its proper divisors (1).

36622991 is an equidigital number, since it uses as much as digits as its factorization.

36622991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 38.

The square root of 36622991 is about 6051.6932341288. The cubic root of 36622991 is about 332.0865375374.

The spelling of 36622991 in words is "thirty-six million, six hundred twenty-two thousand, nine hundred ninety-one".