39649452949 has 2 divisors, whose sum is σ = 39649452950. Its totient is φ = 39649452948.

The previous prime is 39649452923. The next prime is 39649452961. The reversal of 39649452949 is 94925494693.

It is a happy number.

39649452949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33054876100 + 6594576849 = 181810^2 + 81207^2 .

It is a cyclic number.

It is not a de Polignac number, because 39649452949 - 2⁵ = 39649452917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39649452979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19824726474 + 19824726475.

It is an arithmetic number, because the mean of its divisors is an integer number (19824726475).

Almost surely, 2^39649452949 is an apocalyptic number.

It is an amenable number.

39649452949 is a deficient number, since it is larger than the sum of its proper divisors (1).

39649452949 is an equidigital number, since it uses as much as digits as its factorization.

39649452949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75582720, while the sum is 64.

The spelling of 39649452949 in words is "thirty-nine billion, six hundred forty-nine million, four hundred fifty-two thousand, nine hundred forty-nine".