90181279 has 2 divisors, whose sum is σ = 90181280. Its totient is φ = 90181278.

The previous prime is 90181211. The next prime is 90181283. The reversal of 90181279 is 97218109.

It is a strong prime.

It is an emirp because it is prime and its reverse (97218109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90181279 - 2⁷ = 90181151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90181979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45090639 + 45090640.

It is an arithmetic number, because the mean of its divisors is an integer number (45090640).

Almost surely, 2^90181279 is an apocalyptic number.

90181279 is a deficient number, since it is larger than the sum of its proper divisors (1).

90181279 is an equidigital number, since it uses as much as digits as its factorization.

90181279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 90181279 is about 9496.3824164784. The cubic root of 90181279 is about 448.4411560419.

The spelling of 90181279 in words is "ninety million, one hundred eighty-one thousand, two hundred seventy-nine".