39349621 has 2 divisors, whose sum is σ = 39349622. Its totient is φ = 39349620.

The previous prime is 39349613. The next prime is 39349657. The reversal of 39349621 is 12694393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27447121 + 11902500 = 5239^2 + 3450^2 .

It is a cyclic number.

It is not a de Polignac number, because 39349621 - 2³ = 39349613 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 (39349721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19674810 + 19674811.

It is an arithmetic number, because the mean of its divisors is an integer number (19674811).

Almost surely, 2^39349621 is an apocalyptic number.

It is an amenable number.

39349621 is a deficient number, since it is larger than the sum of its proper divisors (1).

39349621 is an equidigital number, since it uses as much as digits as its factorization.

39349621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 37.

The square root of 39349621 is about 6272.9276259176. The cubic root of 39349621 is about 340.1314975787.

The spelling of 39349621 in words is "thirty-nine million, three hundred forty-nine thousand, six hundred twenty-one".