36867991 has 2 divisors, whose sum is σ = 36867992. Its totient is φ = 36867990.

The previous prime is 36867977. The next prime is 36868003. The reversal of 36867991 is 19976863.

It is a strong prime.

It is an emirp because it is prime and its reverse (19976863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36867991 - 2⁷ = 36867863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36867911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18433995 + 18433996.

It is an arithmetic number, because the mean of its divisors is an integer number (18433996).

Almost surely, 2^36867991 is an apocalyptic number.

36867991 is a deficient number, since it is larger than the sum of its proper divisors (1).

36867991 is an equidigital number, since it uses as much as digits as its factorization.

36867991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 36867991 is about 6071.9017613924. The cubic root of 36867991 is about 332.8254216926.

The spelling of 36867991 in words is "thirty-six million, eight hundred sixty-seven thousand, nine hundred ninety-one".