38331421 has 2 divisors, whose sum is σ = 38331422. Its totient is φ = 38331420.

The previous prime is 38331389. The next prime is 38331431. The reversal of 38331421 is 12413383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33756100 + 4575321 = 5810^2 + 2139^2 .

It is a cyclic number.

It is not a de Polignac number, because 38331421 - 2⁵ = 38331389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38331431) 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, 19165710 + 19165711.

It is an arithmetic number, because the mean of its divisors is an integer number (19165711).

Almost surely, 2^38331421 is an apocalyptic number.

It is an amenable number.

38331421 is a deficient number, since it is larger than the sum of its proper divisors (1).

38331421 is an equidigital number, since it uses as much as digits as its factorization.

38331421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 38331421 is about 6191.2374368942. The cubic root of 38331421 is about 337.1721069666.

The spelling of 38331421 in words is "thirty-eight million, three hundred thirty-one thousand, four hundred twenty-one".