90782773 has 2 divisors, whose sum is σ = 90782774. Its totient is φ = 90782772.

The previous prime is 90782767. The next prime is 90782807. The reversal of 90782773 is 37728709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90763729 + 19044 = 9527^2 + 138^2 .

It is a cyclic number.

It is not a de Polignac number, because 90782773 - 2¹³ = 90774581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90782723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45391386 + 45391387.

It is an arithmetic number, because the mean of its divisors is an integer number (45391387).

Almost surely, 2^90782773 is an apocalyptic number.

It is an amenable number.

90782773 is a deficient number, since it is larger than the sum of its proper divisors (1).

90782773 is an equidigital number, since it uses as much as digits as its factorization.

90782773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 90782773 is about 9527.9994227540. Note that the first 3 decimals coincide. The cubic root of 90782773 is about 449.4359566813.

The spelling of 90782773 in words is "ninety million, seven hundred eighty-two thousand, seven hundred seventy-three".