36938921 has 2 divisors, whose sum is σ = 36938922. Its totient is φ = 36938920.

The previous prime is 36938893. The next prime is 36938929. The reversal of 36938921 is 12983963.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26666896 + 10272025 = 5164^2 + 3205^2 .

It is an emirp because it is prime and its reverse (12983963) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36938921 - 2⁶ = 36938857 is a prime.

It is not a weakly prime, because it can be changed into another prime (36938929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18469460 + 18469461.

It is an arithmetic number, because the mean of its divisors is an integer number (18469461).

Almost surely, 2^36938921 is an apocalyptic number.

It is an amenable number.

36938921 is a deficient number, since it is larger than the sum of its proper divisors (1).

36938921 is an equidigital number, since it uses as much as digits as its factorization.

36938921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 36938921 is about 6077.7397937062. The cubic root of 36938921 is about 333.0387249166.

The spelling of 36938921 in words is "thirty-six million, nine hundred thirty-eight thousand, nine hundred twenty-one".