869090437 has 2 divisors, whose sum is σ = 869090438. Its totient is φ = 869090436.

The previous prime is 869090423. The next prime is 869090441. The reversal of 869090437 is 734090968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518427361 + 350663076 = 22769^2 + 18726^2 .

It is a cyclic number.

It is not a de Polignac number, because 869090437 - 2⁷ = 869090309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869090737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434545218 + 434545219.

It is an arithmetic number, because the mean of its divisors is an integer number (434545219).

Almost surely, 2^869090437 is an apocalyptic number.

It is an amenable number.

869090437 is a deficient number, since it is larger than the sum of its proper divisors (1).

869090437 is an equidigital number, since it uses as much as digits as its factorization.

869090437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 869090437 is about 29480.3398386111. The cubic root of 869090437 is about 954.3074708434.

The spelling of 869090437 in words is "eight hundred sixty-nine million, ninety thousand, four hundred thirty-seven".