40212407929 has 2 divisors, whose sum is σ = 40212407930. Its totient is φ = 40212407928.

The previous prime is 40212407927. The next prime is 40212407933. The reversal of 40212407929 is 92970421204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32893263225 + 7319144704 = 181365^2 + 85552^2 .

It is a cyclic number.

It is not a de Polignac number, because 40212407929 - 2¹ = 40212407927 is a prime.

Together with 40212407927, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 40212407891 and 40212407900.

It is not a weakly prime, because it can be changed into another prime (40212407927) 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, 20106203964 + 20106203965.

It is an arithmetic number, because the mean of its divisors is an integer number (20106203965).

Almost surely, 2^40212407929 is an apocalyptic number.

It is an amenable number.

40212407929 is a deficient number, since it is larger than the sum of its proper divisors (1).

40212407929 is an equidigital number, since it uses as much as digits as its factorization.

40212407929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 40212407929 in words is "forty billion, two hundred twelve million, four hundred seven thousand, nine hundred twenty-nine".