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49999639 is a prime number
BaseRepresentation
bin1011111010111…
…0111100010111
310111002020121111
42332232330113
5100244442024
64543355451
71144663354
oct276567427
9114066544
1049999639
1126250518
12148b2b87
13a4881b1
1468d762b
1545c9a94
hex2faef17

49999639 has 2 divisors, whose sum is σ = 49999640. Its totient is φ = 49999638.

The previous prime is 49999637. The next prime is 49999643. The reversal of 49999639 is 93699994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49999639 - 21 = 49999637 is a prime.

Together with 49999637, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49999637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999819 + 24999820.

It is an arithmetic number, because the mean of its divisors is an integer number (24999820).

Almost surely, 249999639 is an apocalyptic number.

49999639 is a deficient number, since it is larger than the sum of its proper divisors (1).

49999639 is an equidigital number, since it uses as much as digits as its factorization.

49999639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4251528, while the sum is 58.

The square root of 49999639 is about 7071.0422852646. The cubic root of 49999639 is about 368.4022632383.

The spelling of 49999639 in words is "forty-nine million, nine hundred ninety-nine thousand, six hundred thirty-nine".