39649452923 has 2 divisors, whose sum is σ = 39649452924. Its totient is φ = 39649452922.

The previous prime is 39649452917. The next prime is 39649452949. The reversal of 39649452923 is 32925494693.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39649452923 - 2²⁰ = 39648404347 is a prime.

It is not a weakly prime, because it can be changed into another prime (39649452823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19824726461 + 19824726462.

It is an arithmetic number, because the mean of its divisors is an integer number (19824726462).

Almost surely, 2^39649452923 is an apocalyptic number.

39649452923 is a deficient number, since it is larger than the sum of its proper divisors (1).

39649452923 is an equidigital number, since it uses as much as digits as its factorization.

39649452923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12597120, while the sum is 56.

The spelling of 39649452923 in words is "thirty-nine billion, six hundred forty-nine million, four hundred fifty-two thousand, nine hundred twenty-three".