90688045 has 16 divisors (see below), whose sum is σ = 130919040. Its totient is φ = 58912704.

The previous prime is 90688019. The next prime is 90688069. The reversal of 90688045 is 54088609.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90688045 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90687989 and 90688007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67522 + ... + 68851.

It is an arithmetic number, because the mean of its divisors is an integer number (8182440).

Almost surely, 2^90688045 is an apocalyptic number.

90688045 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

90688045 is a deficient number, since it is larger than the sum of its proper divisors (40230995).

90688045 is a wasteful number, since it uses less digits than its factorization.

90688045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136404.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 90688045 is about 9523.0270922643. The cubic root of 90688045 is about 449.2795797807.

The spelling of 90688045 in words is "ninety million, six hundred eighty-eight thousand, forty-five".