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68199803 = 79742829
BaseRepresentation
bin1000001000010…
…10010101111011
311202022220112122
410010022111323
5114424343203
610433431455
71455455150
oct404122573
9152286478
1068199803
1135551581
121aa0b58b
131118b319
1490b4227
155ec2538
hex410a57b

68199803 has 4 divisors (see below), whose sum is σ = 77942640. Its totient is φ = 58456968.

The previous prime is 68199787. The next prime is 68199809. The reversal of 68199803 is 30899186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30899186 = 215449593.

It is a cyclic number.

It is not a de Polignac number, because 68199803 - 24 = 68199787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68199809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4871408 + ... + 4871421.

It is an arithmetic number, because the mean of its divisors is an integer number (19485660).

Almost surely, 268199803 is an apocalyptic number.

68199803 is a deficient number, since it is larger than the sum of its proper divisors (9742837).

68199803 is an equidigital number, since it uses as much as digits as its factorization.

68199803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9742836.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 68199803 is about 8258.3172014642. The cubic root of 68199803 is about 408.5648873912.

The spelling of 68199803 in words is "sixty-eight million, one hundred ninety-nine thousand, eight hundred three".

Divisors: 1 7 9742829 68199803