769640449 has 2 divisors, whose sum is σ = 769640450. Its totient is φ = 769640448.

The previous prime is 769640419. The next prime is 769640527. The reversal of 769640449 is 944046967.

It is a happy number.

769640449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 505350400 + 264290049 = 22480^2 + 16257^2 .

It is an emirp because it is prime and its reverse (944046967) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 769640449 - 2²⁵ = 736086017 is a prime.

It is not a weakly prime, because it can be changed into another prime (769640419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384820224 + 384820225.

It is an arithmetic number, because the mean of its divisors is an integer number (384820225).

Almost surely, 2^769640449 is an apocalyptic number.

It is an amenable number.

769640449 is a deficient number, since it is larger than the sum of its proper divisors (1).

769640449 is an equidigital number, since it uses as much as digits as its factorization.

769640449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 769640449 is about 27742.3944352322. The cubic root of 769640449 is about 916.4229599774.

The spelling of 769640449 in words is "seven hundred sixty-nine million, six hundred forty thousand, four hundred forty-nine".