40247323229 has 2 divisors, whose sum is σ = 40247323230. Its totient is φ = 40247323228.

The previous prime is 40247323213. The next prime is 40247323231. The reversal of 40247323229 is 92232374204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20735424004 + 19511899225 = 143998^2 + 139685^2 .

It is a cyclic number.

It is not a de Polignac number, because 40247323229 - 2⁴ = 40247323213 is a prime.

Together with 40247323231, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40247323192 and 40247323201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40247323289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20123661614 + 20123661615.

It is an arithmetic number, because the mean of its divisors is an integer number (20123661615).

Almost surely, 2^40247323229 is an apocalyptic number.

It is an amenable number.

40247323229 is a deficient number, since it is larger than the sum of its proper divisors (1).

40247323229 is an equidigital number, since it uses as much as digits as its factorization.

40247323229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 38.

The spelling of 40247323229 in words is "forty billion, two hundred forty-seven million, three hundred twenty-three thousand, two hundred twenty-nine".