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3856949 is a prime number
BaseRepresentation
bin1110101101101000110101
321020221201222
432231220311
51441410244
6214400125
744532515
oct16555065
97227658
103856949
1121a4868
121360045
13a50725
14725845
15512bee
hex3ada35

3856949 has 2 divisors, whose sum is σ = 3856950. Its totient is φ = 3856948.

The previous prime is 3856921. The next prime is 3856967. The reversal of 3856949 is 9496583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3648100 + 208849 = 1910^2 + 457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-3856949 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3856999) 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, 1928474 + 1928475.

It is an arithmetic number, because the mean of its divisors is an integer number (1928475).

Almost surely, 23856949 is an apocalyptic number.

It is an amenable number.

3856949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3856949 is an equidigital number, since it uses as much as digits as its factorization.

3856949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 3856949 is about 1963.9116578910. The cubic root of 3856949 is about 156.8247601856.

It can be divided in two parts, 38569 and 49, that multiplied together give a palindrome (1889881).

The spelling of 3856949 in words is "three million, eight hundred fifty-six thousand, nine hundred forty-nine".