90722 has 4 divisors (see below), whose sum is σ = 136086. Its totient is φ = 45360.

The previous prime is 90709. The next prime is 90731. The reversal of 90722 is 22709.

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

It can be written as a sum of positive squares in only one way, i.e., 90601 + 121 = 301^2 + 11^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90694 and 90703.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22679 + ... + 22682.

2⁹⁰⁷²² is an apocalyptic number.

90722 is a deficient number, since it is larger than the sum of its proper divisors (45364).

90722 is a wasteful number, since it uses less digits than its factorization.

90722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45363.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 90722 is about 301.2009296134. The cubic root of 90722 is about 44.9335645181.

It can be divided in two parts, 907 and 22, that added together give a palindrome (929).

The spelling of 90722 in words is "ninety thousand, seven hundred twenty-two".