37421389 has 2 divisors, whose sum is σ = 37421390. Its totient is φ = 37421388.

The previous prime is 37421387. The next prime is 37421429. The reversal of 37421389 is 98312473.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24157225 + 13264164 = 4915^2 + 3642^2 .

It is a cyclic number.

It is not a de Polignac number, because 37421389 - 2¹ = 37421387 is a prime.

Together with 37421387, 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 (37421381) 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, 18710694 + 18710695.

It is an arithmetic number, because the mean of its divisors is an integer number (18710695).

Almost surely, 2^37421389 is an apocalyptic number.

It is an amenable number.

37421389 is a deficient number, since it is larger than the sum of its proper divisors (1).

37421389 is an equidigital number, since it uses as much as digits as its factorization.

37421389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 37421389 is about 6117.3024283584. The cubic root of 37421389 is about 334.4824234462.

The spelling of 37421389 in words is "thirty-seven million, four hundred twenty-one thousand, three hundred eighty-nine".