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103081391 = 767321881
BaseRepresentation
bin1100010010011…
…10010110101111
321011222002002022
412021032112233
5202342101031
614121220355
72361114560
oct611162657
9234862068
10103081391
1153206636
122a6316bb
131848220a
14d994167
1590b297b
hex624e5af

103081391 has 8 divisors (see below), whose sum is σ = 117987744. Its totient is φ = 88220160.

The previous prime is 103081379. The next prime is 103081393. The reversal of 103081391 is 193180301.

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

It is not a de Polignac number, because 103081391 - 214 = 103065007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 103081391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103081393) 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, 6230 + ... + 15651.

It is an arithmetic number, because the mean of its divisors is an integer number (14748468).

Almost surely, 2103081391 is an apocalyptic number.

103081391 is a deficient number, since it is larger than the sum of its proper divisors (14906353).

103081391 is an equidigital number, since it uses as much as digits as its factorization.

103081391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22561.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 103081391 is about 10152.9006200199. The cubic root of 103081391 is about 468.8782528823.

The spelling of 103081391 in words is "one hundred three million, eighty-one thousand, three hundred ninety-one".

Divisors: 1 7 673 4711 21881 153167 14725913 103081391