90365905 has 16 divisors (see below), whose sum is σ = 125072640. Its totient is φ = 61394112.

The previous prime is 90365861. The next prime is 90365909. The reversal of 90365905 is 50956309.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90365905 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90365909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8029 + ... + 15658.

It is an arithmetic number, because the mean of its divisors is an integer number (7817040).

Almost surely, 2^90365905 is an apocalyptic number.

It is an amenable number.

90365905 is a deficient number, since it is larger than the sum of its proper divisors (34706735).

90365905 is a wasteful number, since it uses less digits than its factorization.

90365905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23808.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 90365905 is about 9506.0983058245. The cubic root of 90365905 is about 448.7469750962.

It can be divided in two parts, 9036 and 5905, that added together give a palindrome (14941).

The spelling of 90365905 in words is "ninety million, three hundred sixty-five thousand, nine hundred five".