90778367 has 4 divisors (see below), whose sum is σ = 92133336. Its totient is φ = 89423400.

The previous prime is 90778357. The next prime is 90778379. The reversal of 90778367 is 76387709.

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 90778367 - 2⁸ = 90778111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90778307) 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 in 3 ways as a sum of consecutive naturals, for example, 677384 + ... + 677517.

It is an arithmetic number, because the mean of its divisors is an integer number (23033334).

Almost surely, 2^90778367 is an apocalyptic number.

90778367 is a deficient number, since it is larger than the sum of its proper divisors (1354969).

90778367 is a wasteful number, since it uses less digits than its factorization.

90778367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354968.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 90778367 is about 9527.7682066683. The cubic root of 90778367 is about 449.4286856731.

The spelling of 90778367 in words is "ninety million, seven hundred seventy-eight thousand, three hundred sixty-seven".