90242069 has 8 divisors (see below), whose sum is σ = 95703768. Its totient is φ = 84797440.

The previous prime is 90242063. The next prime is 90242071. The reversal of 90242069 is 96024209.

It can be written as a sum of positive squares in 4 ways, for example, as 48121969 + 42120100 = 6937^2 + 6490^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90242069 - 2⁸ = 90241813 is a prime.

It is a super-2 number, since 2×90242069² = 16287262034801522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90242063) 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 7 ways as a sum of consecutive naturals, for example, 7589 + ... + 15429.

It is an arithmetic number, because the mean of its divisors is an integer number (11962971).

Almost surely, 2^90242069 is an apocalyptic number.

It is an amenable number.

90242069 is a deficient number, since it is larger than the sum of its proper divisors (5461699).

90242069 is a wasteful number, since it uses less digits than its factorization.

90242069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8535.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 90242069 is about 9499.5825697764. The cubic root of 90242069 is about 448.5418961478.

The spelling of 90242069 in words is "ninety million, two hundred forty-two thousand, sixty-nine".