869139511 has 2 divisors, whose sum is σ = 869139512. Its totient is φ = 869139510.

The previous prime is 869139503. The next prime is 869139517. The reversal of 869139511 is 115931968.

869139511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 869139511 - 2³ = 869139503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869139517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434569755 + 434569756.

It is an arithmetic number, because the mean of its divisors is an integer number (434569756).

Almost surely, 2^869139511 is an apocalyptic number.

869139511 is a deficient number, since it is larger than the sum of its proper divisors (1).

869139511 is an equidigital number, since it uses as much as digits as its factorization.

869139511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 43.

The square root of 869139511 is about 29481.1721442686. The cubic root of 869139511 is about 954.3254324583.

The spelling of 869139511 in words is "eight hundred sixty-nine million, one hundred thirty-nine thousand, five hundred eleven".