37889389 has 2 divisors, whose sum is σ = 37889390. Its totient is φ = 37889388.

The previous prime is 37889333. The next prime is 37889393. The reversal of 37889389 is 98398873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35462025 + 2427364 = 5955^2 + 1558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37889389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37889309) 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, 18944694 + 18944695.

It is an arithmetic number, because the mean of its divisors is an integer number (18944695).

Almost surely, 2^37889389 is an apocalyptic number.

It is an amenable number.

37889389 is a deficient number, since it is larger than the sum of its proper divisors (1).

37889389 is an equidigital number, since it uses as much as digits as its factorization.

37889389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The square root of 37889389 is about 6155.4357278750. The cubic root of 37889389 is about 335.8710206248.

The spelling of 37889389 in words is "thirty-seven million, eight hundred eighty-nine thousand, three hundred eighty-nine".