39931951231147 has 2 divisors, whose sum is σ = 39931951231148. Its totient is φ = 39931951231146.

The previous prime is 39931951231063. The next prime is 39931951231213. The reversal of 39931951231147 is 74113215913993.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39931951231147 - 2¹¹ = 39931951229099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39931951231091 and 39931951231100.

It is not a weakly prime, because it can be changed into another prime (39931951231547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19965975615573 + 19965975615574.

It is an arithmetic number, because the mean of its divisors is an integer number (19965975615574).

Almost surely, 2^{39931951231147} is an apocalyptic number.

39931951231147 is a deficient number, since it is larger than the sum of its proper divisors (1).

39931951231147 is an equidigital number, since it uses as much as digits as its factorization.

39931951231147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5511240, while the sum is 58.

The spelling of 39931951231147 in words is "thirty-nine trillion, nine hundred thirty-one billion, nine hundred fifty-one million, two hundred thirty-one thousand, one hundred forty-seven".