39248921 has 2 divisors, whose sum is σ = 39248922. Its totient is φ = 39248920.

The previous prime is 39248917. The next prime is 39248939. The reversal of 39248921 is 12984293.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38576521 + 672400 = 6211^2 + 820^2 .

It is a cyclic number.

It is not a de Polignac number, because 39248921 - 2² = 39248917 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39248941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19624460 + 19624461.

It is an arithmetic number, because the mean of its divisors is an integer number (19624461).

Almost surely, 2^39248921 is an apocalyptic number.

It is an amenable number.

39248921 is a deficient number, since it is larger than the sum of its proper divisors (1).

39248921 is an equidigital number, since it uses as much as digits as its factorization.

39248921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 39248921 is about 6264.8959289042. The cubic root of 39248921 is about 339.8411051081.

The spelling of 39248921 in words is "thirty-nine million, two hundred forty-eight thousand, nine hundred twenty-one".