90858745 has 4 divisors (see below), whose sum is σ = 109030500. Its totient is φ = 72686992.

The previous prime is 90858739. The next prime is 90858749. The reversal of 90858745 is 54785809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54785809 = 13 ⋅4214293.

It can be written as a sum of positive squares in 2 ways, for example, as 10361961 + 80496784 = 3219^2 + 8972^2 .

It is a cyclic number.

It is not a de Polignac number, because 90858745 - 2¹⁹ = 90334457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90858695 and 90858704.

It is not an unprimeable number, because it can be changed into a prime (90858749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9085870 + ... + 9085879.

It is an arithmetic number, because the mean of its divisors is an integer number (27257625).

Almost surely, 2^90858745 is an apocalyptic number.

It is an amenable number.

90858745 is a deficient number, since it is larger than the sum of its proper divisors (18171755).

90858745 is a wasteful number, since it uses less digits than its factorization.

90858745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18171754.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 90858745 is about 9531.9853650748. The cubic root of 90858745 is about 449.5612926054.

The spelling of 90858745 in words is "ninety million, eight hundred fifty-eight thousand, seven hundred forty-five".