90503165 has 4 divisors (see below), whose sum is σ = 108603804. Its totient is φ = 72402528.

The previous prime is 90503129. The next prime is 90503173. The reversal of 90503165 is 56130509.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36024004 + 54479161 = 6002^2 + 7381^2 .

It is a cyclic number.

It is not a de Polignac number, because 90503165 - 2¹² = 90499069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9050312 + ... + 9050321.

It is an arithmetic number, because the mean of its divisors is an integer number (27150951).

Almost surely, 2^90503165 is an apocalyptic number.

It is an amenable number.

90503165 is a deficient number, since it is larger than the sum of its proper divisors (18100639).

90503165 is a wasteful number, since it uses less digits than its factorization.

90503165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18100638.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 90503165 is about 9513.3151424727. The cubic root of 90503165 is about 448.9740660911.

The spelling of 90503165 in words is "ninety million, five hundred three thousand, one hundred sixty-five".