37998409 has 2 divisors, whose sum is σ = 37998410. Its totient is φ = 37998408.

The previous prime is 37998407. The next prime is 37998463. The reversal of 37998409 is 90489973.

37998409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32490000 + 5508409 = 5700^2 + 2347^2 .

It is a cyclic number.

It is not a de Polignac number, because 37998409 - 2¹ = 37998407 is a prime.

Together with 37998407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (37998407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18999204 + 18999205.

It is an arithmetic number, because the mean of its divisors is an integer number (18999205).

Almost surely, 2^37998409 is an apocalyptic number.

It is an amenable number.

37998409 is a deficient number, since it is larger than the sum of its proper divisors (1).

37998409 is an equidigital number, since it uses as much as digits as its factorization.

37998409 is an odious number, because the sum of its binary digits is odd.

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

The square root of 37998409 is about 6164.2849544777. The cubic root of 37998409 is about 336.1928485943.

The spelling of 37998409 in words is "thirty-seven million, nine hundred ninety-eight thousand, four hundred nine".