36785921 has 2 divisors, whose sum is σ = 36785922. Its totient is φ = 36785920.

The previous prime is 36785893. The next prime is 36785923. The reversal of 36785921 is 12958763.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22193521 + 14592400 = 4711^2 + 3820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36785921 is a prime.

Together with 36785923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36785923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18392960 + 18392961.

It is an arithmetic number, because the mean of its divisors is an integer number (18392961).

Almost surely, 2^36785921 is an apocalyptic number.

It is an amenable number.

36785921 is a deficient number, since it is larger than the sum of its proper divisors (1).

36785921 is an equidigital number, since it uses as much as digits as its factorization.

36785921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 36785921 is about 6065.1398170199. The cubic root of 36785921 is about 332.5782761797.

The spelling of 36785921 in words is "thirty-six million, seven hundred eighty-five thousand, nine hundred twenty-one".