7408781969 has 2 divisors, whose sum is σ = 7408781970. Its totient is φ = 7408781968.

The previous prime is 7408781921. The next prime is 7408781999. The reversal of 7408781969 is 9691878047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7303924369 + 104857600 = 85463^2 + 10240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7408781969 is a prime.

It is a super-2 number, since 2×7408781969² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7408781909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3704390984 + 3704390985.

It is an arithmetic number, because the mean of its divisors is an integer number (3704390985).

Almost surely, 2^7408781969 is an apocalyptic number.

It is an amenable number.

7408781969 is a deficient number, since it is larger than the sum of its proper divisors (1).

7408781969 is an equidigital number, since it uses as much as digits as its factorization.

7408781969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The square root of 7408781969 is about 86074.2816931980. The cubic root of 7408781969 is about 1949.4657286254.

The spelling of 7408781969 in words is "seven billion, four hundred eight million, seven hundred eighty-one thousand, nine hundred sixty-nine".