7816940429 has 2 divisors, whose sum is σ = 7816940430. Its totient is φ = 7816940428.

The previous prime is 7816940393. The next prime is 7816940449. The reversal of 7816940429 is 9240496187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6711377929 + 1105562500 = 81923^2 + 33250^2 .

It is a cyclic number.

It is not a de Polignac number, because 7816940429 - 2¹² = 7816936333 is a prime.

It is a super-2 number, since 2×7816940429² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7816940449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3908470214 + 3908470215.

It is an arithmetic number, because the mean of its divisors is an integer number (3908470215).

Almost surely, 2^7816940429 is an apocalyptic number.

It is an amenable number.

7816940429 is a deficient number, since it is larger than the sum of its proper divisors (1).

7816940429 is an equidigital number, since it uses as much as digits as its factorization.

7816940429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 7816940429 is about 88413.4629397582. The cubic root of 7816940429 is about 1984.6271766480.

The spelling of 7816940429 in words is "seven billion, eight hundred sixteen million, nine hundred forty thousand, four hundred twenty-nine".