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30901 = 132377
BaseRepresentation
bin111100010110101
31120101111
413202311
51442101
6355021
7156043
oct74265
946344
1030901
1121242
1215a71
13110b0
14b393
159251
hex78b5

30901 has 4 divisors (see below), whose sum is σ = 33292. Its totient is φ = 28512.

The previous prime is 30893. The next prime is 30911. The reversal of 30901 is 10903.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8100 + 22801 = 90^2 + 151^2 .

It is a cyclic number.

It is not a de Polignac number, because 30901 - 23 = 30893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 2377 = 30901 / (3 + 0 + 9 + 0 + 1).

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

30901 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176 + ... + 1201.

It is an arithmetic number, because the mean of its divisors is an integer number (8323).

230901 is an apocalyptic number.

It is an amenable number.

30901 is a deficient number, since it is larger than the sum of its proper divisors (2391).

30901 is a wasteful number, since it uses less digits than its factorization.

30901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2390.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 30901 is about 175.7868026901. The cubic root of 30901 is about 31.3803303589.

The spelling of 30901 in words is "thirty thousand, nine hundred one".

Divisors: 1 13 2377 30901