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83981107 = 743279007
BaseRepresentation
bin1010000000101…
…11001100110011
312212000200102101
411000113030303
5132444343412
612200001231
72036553610
oct500271463
9185020371
1083981107
1143450281
1224160217
1314525482
14b221507
15758d457
hex5017333

83981107 has 8 divisors (see below), whose sum is σ = 98210816. Its totient is φ = 70309512.

The previous prime is 83981081. The next prime is 83981113. The reversal of 83981107 is 70118938.

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

It is not a de Polignac number, because 83981107 - 27 = 83980979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83981707) 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, 139203 + ... + 139804.

It is an arithmetic number, because the mean of its divisors is an integer number (12276352).

Almost surely, 283981107 is an apocalyptic number.

83981107 is a deficient number, since it is larger than the sum of its proper divisors (14229709).

83981107 is a wasteful number, since it uses less digits than its factorization.

83981107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279057.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 83981107 is about 9164.1206342998. The cubic root of 83981107 is about 437.9190772986.

The spelling of 83981107 in words is "eighty-three million, nine hundred eighty-one thousand, one hundred seven".

Divisors: 1 7 43 301 279007 1953049 11997301 83981107