90142293 has 8 divisors (see below), whose sum is σ = 120371008. Its totient is φ = 60004224.

The previous prime is 90142253. The next prime is 90142303. The reversal of 90142293 is 39224109.

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

It is not a de Polignac number, because 90142293 - 2⁶ = 90142229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90142293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90142243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20305 + ... + 24342.

It is an arithmetic number, because the mean of its divisors is an integer number (15046376).

Almost surely, 2^90142293 is an apocalyptic number.

It is an amenable number.

90142293 is a deficient number, since it is larger than the sum of its proper divisors (30228715).

90142293 is a wasteful number, since it uses less digits than its factorization.

90142293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45323.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 90142293 is about 9494.3295181914. The cubic root of 90142293 is about 448.3765253076.

The spelling of 90142293 in words is "ninety million, one hundred forty-two thousand, two hundred ninety-three".