36981797 has 2 divisors, whose sum is σ = 36981798. Its totient is φ = 36981796.

The previous prime is 36981793. The next prime is 36981803. The reversal of 36981797 is 79718963.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36954241 + 27556 = 6079^2 + 166^2 .

It is an emirp because it is prime and its reverse (79718963) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36981797 - 2² = 36981793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36981793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18490898 + 18490899.

It is an arithmetic number, because the mean of its divisors is an integer number (18490899).

Almost surely, 2^36981797 is an apocalyptic number.

It is an amenable number.

36981797 is a deficient number, since it is larger than the sum of its proper divisors (1).

36981797 is an equidigital number, since it uses as much as digits as its factorization.

36981797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 50.

The square root of 36981797 is about 6081.2660688380. The cubic root of 36981797 is about 333.1675307644.

The spelling of 36981797 in words is "thirty-six million, nine hundred eighty-one thousand, seven hundred ninety-seven".