90783009634 has 4 divisors (see below), whose sum is σ = 136174514454. Its totient is φ = 45391504816.

The previous prime is 90783009593. The next prime is 90783009637. The reversal of 90783009634 is 43690038709.

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

It can be written as a sum of positive squares in only one way, i.e., 86640156409 + 4142853225 = 294347^2 + 64365^2 .

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 not an unprimeable number, because it can be changed into a prime (90783009637) 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, 22695752407 + ... + 22695752410.

Almost surely, 2^90783009634 is an apocalyptic number.

90783009634 is a deficient number, since it is larger than the sum of its proper divisors (45391504820).

90783009634 is a wasteful number, since it uses less digits than its factorization.

90783009634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45391504819.

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 90783009634 in words is "ninety billion, seven hundred eighty-three million, nine thousand, six hundred thirty-four".