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31378103 is a prime number
BaseRepresentation
bin111011110110…
…0101010110111
32012001011122222
41313230222313
531013044403
63040312555
7530465231
oct167545267
965034588
1031378103
1116791919
12a61275b
136668333
14424b251
152b4c338
hex1decab7

31378103 has 2 divisors, whose sum is σ = 31378104. Its totient is φ = 31378102.

The previous prime is 31378097. The next prime is 31378111. The reversal of 31378103 is 30187313.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-31378103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31378153) 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 as a sum of consecutive naturals, namely, 15689051 + 15689052.

It is an arithmetic number, because the mean of its divisors is an integer number (15689052).

Almost surely, 231378103 is an apocalyptic number.

31378103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31378103 is an equidigital number, since it uses as much as digits as its factorization.

31378103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 31378103 is about 5601.6161060894. The cubic root of 31378103 is about 315.4100748083.

The spelling of 31378103 in words is "thirty-one million, three hundred seventy-eight thousand, one hundred three".