869291149 has 2 divisors, whose sum is σ = 869291150. Its totient is φ = 869291148.

The previous prime is 869291131. The next prime is 869291177. The reversal of 869291149 is 941192968.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 868775625 + 515524 = 29475^2 + 718^2 .

It is a cyclic number.

It is not a de Polignac number, because 869291149 - 2²¹ = 867193997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869298149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434645574 + 434645575.

It is an arithmetic number, because the mean of its divisors is an integer number (434645575).

Almost surely, 2^869291149 is an apocalyptic number.

It is an amenable number.

869291149 is a deficient number, since it is larger than the sum of its proper divisors (1).

869291149 is an equidigital number, since it uses as much as digits as its factorization.

869291149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 49.

The square root of 869291149 is about 29483.7438090891. The cubic root of 869291149 is about 954.3809293350.

The spelling of 869291149 in words is "eight hundred sixty-nine million, two hundred ninety-one thousand, one hundred forty-nine".