90154018 has 4 divisors (see below), whose sum is σ = 135231030. Its totient is φ = 45077008.

The previous prime is 90153989. The next prime is 90154021. The reversal of 90154018 is 81045109.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81045109 = 53 ⋅1529153.

It can be written as a sum of positive squares in only one way, i.e., 89245809 + 908209 = 9447^2 + 953^2 .

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, 22538503 + ... + 22538506.

Almost surely, 2^90154018 is an apocalyptic number.

90154018 is a deficient number, since it is larger than the sum of its proper divisors (45077012).

90154018 is a wasteful number, since it uses less digits than its factorization.

90154018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45077011.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 90154018 is about 9494.9469719425. The cubic root of 90154018 is about 448.3959648945.

The spelling of 90154018 in words is "ninety million, one hundred fifty-four thousand, eighteen".