769238909 has 2 divisors, whose sum is σ = 769238910. Its totient is φ = 769238908.

The previous prime is 769238903. The next prime is 769238957. The reversal of 769238909 is 909832967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 716632900 + 52606009 = 26770^2 + 7253^2 .

It is a cyclic number.

It is not a de Polignac number, because 769238909 - 2⁴ = 769238893 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (769238903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384619454 + 384619455.

It is an arithmetic number, because the mean of its divisors is an integer number (384619455).

Almost surely, 2^769238909 is an apocalyptic number.

It is an amenable number.

769238909 is a deficient number, since it is larger than the sum of its proper divisors (1).

769238909 is an equidigital number, since it uses as much as digits as its factorization.

769238909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 769238909 is about 27735.1565526499. The cubic root of 769238909 is about 916.2635589267.

The spelling of 769238909 in words is "seven hundred sixty-nine million, two hundred thirty-eight thousand, nine hundred nine".