37821349 has 2 divisors, whose sum is σ = 37821350. Its totient is φ = 37821348.

The previous prime is 37821347. The next prime is 37821353. The reversal of 37821349 is 94312873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31024900 + 6796449 = 5570^2 + 2607^2 .

It is a cyclic number.

It is not a de Polignac number, because 37821349 - 2¹ = 37821347 is a prime.

Together with 37821347, 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 (37821341) 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, 18910674 + 18910675.

It is an arithmetic number, because the mean of its divisors is an integer number (18910675).

Almost surely, 2^37821349 is an apocalyptic number.

It is an amenable number.

37821349 is a deficient number, since it is larger than the sum of its proper divisors (1).

37821349 is an equidigital number, since it uses as much as digits as its factorization.

37821349 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 37821349 is about 6149.9064220523. The cubic root of 37821349 is about 335.6698529826.

The spelling of 37821349 in words is "thirty-seven million, eight hundred twenty-one thousand, three hundred forty-nine".