39419221 has 2 divisors, whose sum is σ = 39419222. Its totient is φ = 39419220.

The previous prime is 39419213. The next prime is 39419269. The reversal of 39419221 is 12291493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34644996 + 4774225 = 5886^2 + 2185^2 .

It is a cyclic number.

It is not a de Polignac number, because 39419221 - 2³ = 39419213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39419521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19709610 + 19709611.

It is an arithmetic number, because the mean of its divisors is an integer number (19709611).

Almost surely, 2^39419221 is an apocalyptic number.

It is an amenable number.

39419221 is a deficient number, since it is larger than the sum of its proper divisors (1).

39419221 is an equidigital number, since it uses as much as digits as its factorization.

39419221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 39419221 is about 6278.4728238641. The cubic root of 39419221 is about 340.3319163541.

The spelling of 39419221 in words is "thirty-nine million, four hundred nineteen thousand, two hundred twenty-one".