39931402923 has 24 divisors (see below), whose sum is σ = 59901993840. Its totient is φ = 26614705248.

The previous prime is 39931402921. The next prime is 39931402981. The reversal of 39931402923 is 32920413993.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 39931402923 - 2¹ = 39931402921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39931402921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9342915 + ... + 9347187.

It is an arithmetic number, because the mean of its divisors is an integer number (2495916410).

Almost surely, 2^39931402923 is an apocalyptic number.

39931402923 is a deficient number, since it is larger than the sum of its proper divisors (19970590917).

39931402923 is an frugal number, since it uses more digits than its factorization.

39931402923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8567 (or 4276 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The spelling of 39931402923 in words is "thirty-nine billion, nine hundred thirty-one million, four hundred two thousand, nine hundred twenty-three".