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6989947 is a prime number
BaseRepresentation
bin11010101010100001111011
3111011010101221
4122222201323
53242134242
6405452511
7113261566
oct32524173
914133357
106989947
113a44718
122411137
1315a9783
14cdd4dd
15931167
hex6aa87b

6989947 has 2 divisors, whose sum is σ = 6989948. Its totient is φ = 6989946.

The previous prime is 6989933. The next prime is 6989959. The reversal of 6989947 is 7499896.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6989947 - 27 = 6989819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6989894 and 6989903.

It is not a weakly prime, because it can be changed into another prime (6989987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494973 + 3494974.

It is an arithmetic number, because the mean of its divisors is an integer number (3494974).

Almost surely, 26989947 is an apocalyptic number.

6989947 is a deficient number, since it is larger than the sum of its proper divisors (1).

6989947 is an equidigital number, since it uses as much as digits as its factorization.

6989947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 52.

The square root of 6989947 is about 2643.8507900409. The cubic root of 6989947 is about 191.2014996556.

The spelling of 6989947 in words is "six million, nine hundred eighty-nine thousand, nine hundred forty-seven".