902242181 has 2 divisors, whose sum is σ = 902242182. Its totient is φ = 902242180.

The previous prime is 902242177. The next prime is 902242213. The reversal of 902242181 is 181242209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 707081281 + 195160900 = 26591^2 + 13970^2 .

It is an emirp because it is prime and its reverse (181242209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 902242181 - 2² = 902242177 is a prime.

It is a super-2 number, since 2×902242181² = 1628081906351273522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (904242181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451121090 + 451121091.

It is an arithmetic number, because the mean of its divisors is an integer number (451121091).

Almost surely, 2^902242181 is an apocalyptic number.

It is an amenable number.

902242181 is a deficient number, since it is larger than the sum of its proper divisors (1).

902242181 is an equidigital number, since it uses as much as digits as its factorization.

902242181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 902242181 is about 30037.3464373936. The cubic root of 902242181 is about 966.2904982002.

The spelling of 902242181 in words is "nine hundred two million, two hundred forty-two thousand, one hundred eighty-one".