90301985 has 4 divisors (see below), whose sum is σ = 108362388. Its totient is φ = 72241584.

The previous prime is 90301973. The next prime is 90301999. The reversal of 90301985 is 58910309.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58910309 = 1031 ⋅57139.

It can be written as a sum of positive squares in 2 ways, for example, as 37405456 + 52896529 = 6116^2 + 7273^2 .

It is a cyclic number.

It is not a de Polignac number, because 90301985 - 2¹⁰ = 90300961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9030194 + ... + 9030203.

It is an arithmetic number, because the mean of its divisors is an integer number (27090597).

Almost surely, 2^90301985 is an apocalyptic number.

It is an amenable number.

90301985 is a deficient number, since it is larger than the sum of its proper divisors (18060403).

90301985 is a wasteful number, since it uses less digits than its factorization.

90301985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18060402.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 90301985 is about 9502.7356587459. The cubic root of 90301985 is about 448.6411436160.

The spelling of 90301985 in words is "ninety million, three hundred one thousand, nine hundred eighty-five".