90771745 has 8 divisors (see below), whose sum is σ = 111583080. Its totient is φ = 70846080.

The previous prime is 90771743. The next prime is 90771763. The reversal of 90771745 is 54717709.

It can be written as a sum of positive squares in 4 ways, for example, as 2486929 + 88284816 = 1577^2 + 9396^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90771745 - 2¹ = 90771743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90771698 and 90771707.

It is not an unprimeable number, because it can be changed into a prime (90771743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221190 + ... + 221599.

It is an arithmetic number, because the mean of its divisors is an integer number (13947885).

Almost surely, 2^90771745 is an apocalyptic number.

It is an amenable number.

90771745 is a deficient number, since it is larger than the sum of its proper divisors (20811335).

90771745 is a wasteful number, since it uses less digits than its factorization.

90771745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442835.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 90771745 is about 9527.4206897775. The cubic root of 90771745 is about 449.4177572650.

The spelling of 90771745 in words is "ninety million, seven hundred seventy-one thousand, seven hundred forty-five".