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99870047 is a prime number
BaseRepresentation
bin1011111001111…
…10010101011111
320221220220221122
411330332111133
5201031320142
613524321155
72321611214
oct574762537
9227826848
1099870047
1151412932
12295431bb
13178c9604
14d399b0b
158b7b1d2
hex5f3e55f

99870047 has 2 divisors, whose sum is σ = 99870048. Its totient is φ = 99870046.

The previous prime is 99870031. The next prime is 99870049. The reversal of 99870047 is 74007899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99870047 - 24 = 99870031 is a prime.

Together with 99870049, 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 (99870049) 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, 49935023 + 49935024.

It is an arithmetic number, because the mean of its divisors is an integer number (49935024).

Almost surely, 299870047 is an apocalyptic number.

99870047 is a deficient number, since it is larger than the sum of its proper divisors (1).

99870047 is an equidigital number, since it uses as much as digits as its factorization.

99870047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 99870047 is about 9993.5002376545. The cubic root of 99870047 is about 463.9577334047.

The spelling of 99870047 in words is "ninety-nine million, eight hundred seventy thousand, forty-seven".