869761889 has 2 divisors, whose sum is σ = 869761890. Its totient is φ = 869761888.

The previous prime is 869761883. The next prime is 869761933. The reversal of 869761889 is 988167968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 796368400 + 73393489 = 28220^2 + 8567^2 .

It is a cyclic number.

It is not a de Polignac number, because 869761889 - 2⁴ = 869761873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (869761883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434880944 + 434880945.

It is an arithmetic number, because the mean of its divisors is an integer number (434880945).

Almost surely, 2^869761889 is an apocalyptic number.

It is an amenable number.

869761889 is a deficient number, since it is larger than the sum of its proper divisors (1).

869761889 is an equidigital number, since it uses as much as digits as its factorization.

869761889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 62.

The square root of 869761889 is about 29491.7257718161. The cubic root of 869761889 is about 954.5531709014.

The spelling of 869761889 in words is "eight hundred sixty-nine million, seven hundred sixty-one thousand, eight hundred eighty-nine".