36997421 has 2 divisors, whose sum is σ = 36997422. Its totient is φ = 36997420.

The previous prime is 36997399. The next prime is 36997451. The reversal of 36997421 is 12479963.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27144100 + 9853321 = 5210^2 + 3139^2 .

It is a cyclic number.

It is not a de Polignac number, because 36997421 - 2¹⁸ = 36735277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36997451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18498710 + 18498711.

It is an arithmetic number, because the mean of its divisors is an integer number (18498711).

Almost surely, 2^36997421 is an apocalyptic number.

It is an amenable number.

36997421 is a deficient number, since it is larger than the sum of its proper divisors (1).

36997421 is an equidigital number, since it uses as much as digits as its factorization.

36997421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 36997421 is about 6082.5505341098. The cubic root of 36997421 is about 333.2144428224.

The spelling of 36997421 in words is "thirty-six million, nine hundred ninety-seven thousand, four hundred twenty-one".