37438861 has 2 divisors, whose sum is σ = 37438862. Its totient is φ = 37438860.

The previous prime is 37438859. The next prime is 37438867. The reversal of 37438861 is 16883473.

37438861 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., 35462025 + 1976836 = 5955^2 + 1406^2 .

It is an emirp because it is prime and its reverse (16883473) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37438861 - 2¹ = 37438859 is a prime.

Together with 37438859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37438867) 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, 18719430 + 18719431.

It is an arithmetic number, because the mean of its divisors is an integer number (18719431).

Almost surely, 2^37438861 is an apocalyptic number.

It is an amenable number.

37438861 is a deficient number, since it is larger than the sum of its proper divisors (1).

37438861 is an equidigital number, since it uses as much as digits as its factorization.

37438861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 37438861 is about 6118.7303421543. The cubic root of 37438861 is about 334.5344718224.

The spelling of 37438861 in words is "thirty-seven million, four hundred thirty-eight thousand, eight hundred sixty-one".