90329779 has 4 divisors (see below), whose sum is σ = 90351040. Its totient is φ = 90308520.

The previous prime is 90329777. The next prime is 90329797. The reversal of 90329779 is 97792309.

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 90329779 - 2¹ = 90329777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90329773) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1827 + ... + 13564.

It is an arithmetic number, because the mean of its divisors is an integer number (22587760).

Almost surely, 2^90329779 is an apocalyptic number.

90329779 is a deficient number, since it is larger than the sum of its proper divisors (21261).

90329779 is a wasteful number, since it uses less digits than its factorization.

90329779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21260.

The product of its (nonzero) digits is 214326, while the sum is 46.

The square root of 90329779 is about 9504.1979672143. The cubic root of 90329779 is about 448.6871679008.

The spelling of 90329779 in words is "ninety million, three hundred twenty-nine thousand, seven hundred seventy-nine".