39927348721 has 32 divisors (see below), whose sum is σ = 45665586176. Its totient is φ = 34642080000.

The previous prime is 39927348701. The next prime is 39927348739. The reversal of 39927348721 is 12784372993.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 39927348721 - 2⁵ = 39927348689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39927348701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9854146 + ... + 9858196.

It is an arithmetic number, because the mean of its divisors is an integer number (1427049568).

Almost surely, 2^39927348721 is an apocalyptic number.

39927348721 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

39927348721 is a deficient number, since it is larger than the sum of its proper divisors (5738237455).

39927348721 is a wasteful number, since it uses less digits than its factorization.

39927348721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4793.

The product of its digits is 4572288, while the sum is 55.

The spelling of 39927348721 in words is "thirty-nine billion, nine hundred twenty-seven million, three hundred forty-eight thousand, seven hundred twenty-one".