39904349 has 2 divisors, whose sum is σ = 39904350. Its totient is φ = 39904348.

The previous prime is 39904339. The next prime is 39904369. The reversal of 39904349 is 94340993.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39601849 + 302500 = 6293^2 + 550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39904349 is a prime.

It is a super-2 number, since 2×39904349² = 3184714138227602, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39904339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19952174 + 19952175.

It is an arithmetic number, because the mean of its divisors is an integer number (19952175).

Almost surely, 2^39904349 is an apocalyptic number.

It is an amenable number.

39904349 is a deficient number, since it is larger than the sum of its proper divisors (1).

39904349 is an equidigital number, since it uses as much as digits as its factorization.

39904349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 39904349 is about 6316.9889187808. The cubic root of 39904349 is about 341.7223702424.

The spelling of 39904349 in words is "thirty-nine million, nine hundred four thousand, three hundred forty-nine".