40947163931 has 2 divisors, whose sum is σ = 40947163932. Its totient is φ = 40947163930.

The previous prime is 40947163919. The next prime is 40947163981. The reversal of 40947163931 is 13936174904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40947163931 - 2⁶ = 40947163867 is a prime.

It is a super-2 number, since 2×40947163931² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40947163981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20473581965 + 20473581966.

It is an arithmetic number, because the mean of its divisors is an integer number (20473581966).

Almost surely, 2^40947163931 is an apocalyptic number.

40947163931 is a deficient number, since it is larger than the sum of its proper divisors (1).

40947163931 is an equidigital number, since it uses as much as digits as its factorization.

40947163931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 40947163931 in words is "forty billion, nine hundred forty-seven million, one hundred sixty-three thousand, nine hundred thirty-one".