90775774 has 4 divisors (see below), whose sum is σ = 136163664. Its totient is φ = 45387886.

The previous prime is 90775759. The next prime is 90775793. The reversal of 90775774 is 47757709.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47757709 = 17 ⋅2809277.

It is a super-2 number, since 2×90775774² = 16480482290598152, which contains 22 as substring.

It is a congruent 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, 22693942 + ... + 22693945.

It is an arithmetic number, because the mean of its divisors is an integer number (34040916).

Almost surely, 2^90775774 is an apocalyptic number.

90775774 is a deficient number, since it is larger than the sum of its proper divisors (45387890).

90775774 is a wasteful number, since it uses less digits than its factorization.

90775774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45387889.

The product of its (nonzero) digits is 432180, while the sum is 46.

The square root of 90775774 is about 9527.6321297582. The cubic root of 90775774 is about 449.4244064609.

The spelling of 90775774 in words is "ninety million, seven hundred seventy-five thousand, seven hundred seventy-four".