90777487 has 4 divisors (see below), whose sum is σ = 91676376. Its totient is φ = 89878600.

The previous prime is 90777469. The next prime is 90777493. The reversal of 90777487 is 78477709.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90777487 - 2¹¹ = 90775439 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90777487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90777437) 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, 449293 + ... + 449494.

It is an arithmetic number, because the mean of its divisors is an integer number (22919094).

Almost surely, 2^90777487 is an apocalyptic number.

90777487 is a deficient number, since it is larger than the sum of its proper divisors (898889).

90777487 is a wasteful number, since it uses less digits than its factorization.

90777487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898888.

The product of its (nonzero) digits is 691488, while the sum is 49.

The square root of 90777487 is about 9527.7220257520. The cubic root of 90777487 is about 449.4272334236.

The spelling of 90777487 in words is "ninety million, seven hundred seventy-seven thousand, four hundred eighty-seven".