90506642 has 4 divisors (see below), whose sum is σ = 135759966. Its totient is φ = 45253320.

The previous prime is 90506629. The next prime is 90506659. The reversal of 90506642 is 24660509.

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., 82828201 + 7678441 = 9101^2 + 2771^2 .

It is a super-2 number, since 2×90506642² = 16382904492232328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90506599 and 90506608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22626659 + ... + 22626662.

Almost surely, 2^90506642 is an apocalyptic number.

90506642 is a deficient number, since it is larger than the sum of its proper divisors (45253324).

90506642 is a wasteful number, since it uses less digits than its factorization.

90506642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45253323.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 90506642 is about 9513.4978845848. The cubic root of 90506642 is about 448.9798156610.

The spelling of 90506642 in words is "ninety million, five hundred six thousand, six hundred forty-two".