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30693 = 313787
BaseRepresentation
bin111011111100101
31120002210
413133211
51440233
6354033
7155325
oct73745
946083
1030693
1121073
1215919
1310c80
14b285
159163
hex77e5

30693 has 8 divisors (see below), whose sum is σ = 44128. Its totient is φ = 18864.

The previous prime is 30689. The next prime is 30697. The reversal of 30693 is 39603.

It is an interprime number because it is at equal distance from previous prime (30689) and next prime (30697).

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

It is not a de Polignac number, because 30693 - 22 = 30689 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30697) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 355 + ... + 432.

It is an arithmetic number, because the mean of its divisors is an integer number (5516).

230693 is an apocalyptic number.

It is an amenable number.

30693 is a deficient number, since it is larger than the sum of its proper divisors (13435).

30693 is a wasteful number, since it uses less digits than its factorization.

30693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803.

The product of its (nonzero) digits is 486, while the sum is 21.

The square root of 30693 is about 175.1941779855. The cubic root of 30693 is about 31.3097629689.

The spelling of 30693 in words is "thirty thousand, six hundred ninety-three".

Divisors: 1 3 13 39 787 2361 10231 30693