90911378 has 4 divisors (see below), whose sum is σ = 136367070. Its totient is φ = 45455688.

The previous prime is 90911369. The next prime is 90911441. The reversal of 90911378 is 87311909.

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., 90003169 + 908209 = 9487^2 + 953^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22727843 + ... + 22727846.

Almost surely, 2^90911378 is an apocalyptic number.

90911378 is a deficient number, since it is larger than the sum of its proper divisors (45455692).

90911378 is a wasteful number, since it uses less digits than its factorization.

90911378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45455691.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 90911378 is about 9534.7458277607. The cubic root of 90911378 is about 449.6480837082.

The spelling of 90911378 in words is "ninety million, nine hundred eleven thousand, three hundred seventy-eight".