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99987959 is a prime number
BaseRepresentation
bin1011111010110…
…11000111110111
320222010220200202
411331123013313
5201044103314
613531031115
72322612041
oct575330767
9228126622
1099987959
1151493485
122959b49b
131793b196
14d3caa91
158ba10de
hex5f5b1f7

99987959 has 2 divisors, whose sum is σ = 99987960. Its totient is φ = 99987958.

The previous prime is 99987917. The next prime is 99987961. The reversal of 99987959 is 95978999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-99987959 is a prime.

Together with 99987961, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99987895 and 99987904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99927959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49993979 + 49993980.

It is an arithmetic number, because the mean of its divisors is an integer number (49993980).

Almost surely, 299987959 is an apocalyptic number.

99987959 is a deficient number, since it is larger than the sum of its proper divisors (1).

99987959 is an equidigital number, since it uses as much as digits as its factorization.

99987959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16533720, while the sum is 65.

The square root of 99987959 is about 9999.3979318757. The cubic root of 99987959 is about 464.1402528231.

The spelling of 99987959 in words is "ninety-nine million, nine hundred eighty-seven thousand, nine hundred fifty-nine".