90722169 has 12 divisors (see below), whose sum is σ = 137940400. Its totient is φ = 57298104.

The previous prime is 90722147. The next prime is 90722227. The reversal of 90722169 is 96122709.

It is not a de Polignac number, because 90722169 - 2¹¹ = 90720121 is a prime.

It is a super-2 number, since 2×90722169² = 16461023896129122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90722119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 265099 + ... + 265440.

Almost surely, 2^90722169 is an apocalyptic number.

It is an amenable number.

90722169 is a deficient number, since it is larger than the sum of its proper divisors (47218231).

90722169 is a wasteful number, since it uses less digits than its factorization.

90722169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530564 (or 530561 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 90722169 is about 9524.8185809495. The cubic root of 90722169 is about 449.3359241932.

The spelling of 90722169 in words is "ninety million, seven hundred twenty-two thousand, one hundred sixty-nine".