90412705 has 4 divisors (see below), whose sum is σ = 108495252. Its totient is φ = 72330160.

The previous prime is 90412669. The next prime is 90412717. The reversal of 90412705 is 50721409.

It is a happy number.

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 21986721 + 68425984 = 4689^2 + 8272^2 .

It is not a de Polignac number, because 90412705 - 2⁹ = 90412193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9041266 + ... + 9041275.

It is an arithmetic number, because the mean of its divisors is an integer number (27123813).

Almost surely, 2^90412705 is an apocalyptic number.

It is an amenable number.

90412705 is a deficient number, since it is larger than the sum of its proper divisors (18082547).

90412705 is a wasteful number, since it uses less digits than its factorization.

90412705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18082546.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 90412705 is about 9508.5595649394. The cubic root of 90412705 is about 448.8244295815.

The spelling of 90412705 in words is "ninety million, four hundred twelve thousand, seven hundred five".