90019577 has 2 divisors, whose sum is σ = 90019578. Its totient is φ = 90019576.

The previous prime is 90019571. The next prime is 90019613. The reversal of 90019577 is 77591009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88811776 + 1207801 = 9424^2 + 1099^2 .

It is a cyclic number.

It is not a de Polignac number, because 90019577 - 2²² = 85825273 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90019577.

It is not a weakly prime, because it can be changed into another prime (90019571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45009788 + 45009789.

It is an arithmetic number, because the mean of its divisors is an integer number (45009789).

Almost surely, 2^90019577 is an apocalyptic number.

It is an amenable number.

90019577 is a deficient number, since it is larger than the sum of its proper divisors (1).

90019577 is an equidigital number, since it uses as much as digits as its factorization.

90019577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19845, while the sum is 38.

The square root of 90019577 is about 9487.8647228973. The cubic root of 90019577 is about 448.1729658040.

The spelling of 90019577 in words is "ninety million, nineteen thousand, five hundred seventy-seven".