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30631 is a prime number
BaseRepresentation
bin111011110100111
31120000111
413132213
51440011
6353451
7155206
oct73647
946014
1030631
1121017
1215887
1310c33
14b23d
159121
hex77a7

30631 has 2 divisors, whose sum is σ = 30632. Its totient is φ = 30630.

The previous prime is 30593. The next prime is 30637. The reversal of 30631 is 13603.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30631 - 29 = 30119 is a prime.

It is a super-2 number, since 2×306312 = 1876516322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15315 + 15316.

It is an arithmetic number, because the mean of its divisors is an integer number (15316).

230631 is an apocalyptic number.

30631 is a deficient number, since it is larger than the sum of its proper divisors (1).

30631 is an equidigital number, since it uses as much as digits as its factorization.

30631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 30631 is about 175.0171420176. The cubic root of 30631 is about 31.2886668030.

The spelling of 30631 in words is "thirty thousand, six hundred thirty-one".