902181229 has 2 divisors, whose sum is σ = 902181230. Its totient is φ = 902181228.

The previous prime is 902181227. The next prime is 902181311. The reversal of 902181229 is 922181209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527758729 + 374422500 = 22973^2 + 19350^2 .

It is an emirp because it is prime and its reverse (922181209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 902181229 - 2¹ = 902181227 is a prime.

Together with 902181227, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 902181194 and 902181203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (902181221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451090614 + 451090615.

It is an arithmetic number, because the mean of its divisors is an integer number (451090615).

Almost surely, 2^902181229 is an apocalyptic number.

It is an amenable number.

902181229 is a deficient number, since it is larger than the sum of its proper divisors (1).

902181229 is an equidigital number, since it uses as much as digits as its factorization.

902181229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 902181229 is about 30036.3318166516. The cubic root of 902181229 is about 966.2687380912.

The spelling of 902181229 in words is "nine hundred two million, one hundred eighty-one thousand, two hundred twenty-nine".