90222779 has 4 divisors (see below), whose sum is σ = 90248760. Its totient is φ = 90196800.

The previous prime is 90222749. The next prime is 90222809. The reversal of 90222779 is 97722209.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (90222749) and next prime (90222809).

It is a cyclic number.

It is not a de Polignac number, because 90222779 - 2¹² = 90218683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90222749) 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 in 3 ways as a sum of consecutive naturals, for example, 6797 + ... + 15054.

It is an arithmetic number, because the mean of its divisors is an integer number (22562190).

Almost surely, 2^90222779 is an apocalyptic number.

90222779 is a deficient number, since it is larger than the sum of its proper divisors (25981).

90222779 is a wasteful number, since it uses less digits than its factorization.

90222779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25980.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 90222779 is about 9498.5672077424. The cubic root of 90222779 is about 448.5099340047.

The spelling of 90222779 in words is "ninety million, two hundred twenty-two thousand, seven hundred seventy-nine".