90219837 has 8 divisors (see below), whose sum is σ = 122852736. Its totient is φ = 58866752.

The previous prime is 90219781. The next prime is 90219851. The reversal of 90219837 is 73891209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90219837 - 2¹¹ = 90217789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90219795 and 90219804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90219887) 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 7 ways as a sum of consecutive naturals, for example, 319788 + ... + 320069.

It is an arithmetic number, because the mean of its divisors is an integer number (15356592).

Almost surely, 2^90219837 is an apocalyptic number.

It is an amenable number.

90219837 is a deficient number, since it is larger than the sum of its proper divisors (32632899).

90219837 is a wasteful number, since it uses less digits than its factorization.

90219837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639907.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 90219837 is about 9498.4123410178. The cubic root of 90219837 is about 448.5050589219.

The spelling of 90219837 in words is "ninety million, two hundred nineteen thousand, eight hundred thirty-seven".