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250007993 = 472113177
BaseRepresentation
bin11101110011011…
…01000110111001
3122102102201111022
432321231012321
51003000223433
640450312225
76124014164
oct1671550671
9572381438
10250007993
11119139784
126b888675
133ca46231
1516e36698
hexee6d1b9

250007993 has 6 divisors (see below), whose sum is σ = 255442746. Its totient is φ = 244686512.

The previous prime is 250007987. The next prime is 250008007. The reversal of 250007993 is 399700052.

It can be written as a sum of positive squares in only one way, i.e., 139169209 + 110838784 = 11797^2 + 10528^2 .

It is a de Polignac number, because none of the positive numbers 2k-250007993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (250007393) 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 in 5 ways as a sum of consecutive naturals, for example, 54380 + ... + 58797.

It is an arithmetic number, because the mean of its divisors is an integer number (42573791).

Almost surely, 2250007993 is an apocalyptic number.

It is an amenable number.

250007993 is a deficient number, since it is larger than the sum of its proper divisors (5434753).

250007993 is an equidigital number, since it uses as much as digits as its factorization.

250007993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113271 (or 113224 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 250007993 is about 15811.6410596750. The cubic root of 250007993 is about 629.9672385752.

The spelling of 250007993 in words is "two hundred fifty million, seven thousand, nine hundred ninety-three".

Divisors: 1 47 2209 113177 5319319 250007993