37878889 has 2 divisors, whose sum is σ = 37878890. Its totient is φ = 37878888.

The previous prime is 37878887. The next prime is 37878949. The reversal of 37878889 is 98887873.

37878889 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., 35046400 + 2832489 = 5920^2 + 1683^2 .

It is a cyclic number.

It is not a de Polignac number, because 37878889 - 2¹ = 37878887 is a prime.

Together with 37878887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (37878887) 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, 18939444 + 18939445.

It is an arithmetic number, because the mean of its divisors is an integer number (18939445).

Almost surely, 2^37878889 is an apocalyptic number.

It is an amenable number.

37878889 is a deficient number, since it is larger than the sum of its proper divisors (1).

37878889 is an equidigital number, since it uses as much as digits as its factorization.

37878889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5419008, while the sum is 58.

The square root of 37878889 is about 6154.5827640873. The cubic root of 37878889 is about 335.8399919593.

The spelling of 37878889 in words is "thirty-seven million, eight hundred seventy-eight thousand, eight hundred eighty-nine".