90147 has 8 divisors (see below), whose sum is σ = 121600. Its totient is φ = 59400.
The previous prime is 90127. The next prime is 90149. The reversal of 90147 is 74109.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 90147 - 27 = 90019 is a prime.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 90147.
It is not an unprimeable number, because it can be changed into a prime (90149) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354 + ... + 552.
It is an arithmetic number, because the mean of its divisors is an integer number (15200).
290147 is an apocalyptic number.
90147 is a deficient number, since it is larger than the sum of its proper divisors (31453).
90147 is a wasteful number, since it uses less digits than its factorization.
90147 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 353.
The product of its (nonzero) digits is 252, while the sum is 21.
The square root of 90147 is about 300.2449000400. The cubic root of 90147 is about 44.8384329530.
The spelling of 90147 in words is "ninety thousand, one hundred forty-seven".
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