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64919 is a prime number
BaseRepresentation
bin1111110110010111
310022001102
433312113
54034134
61220315
7360161
oct176627
9108042
1064919
1144858
123169b
132371a
1419931
151437e
hexfd97

64919 has 2 divisors, whose sum is σ = 64920. Its totient is φ = 64918.

The previous prime is 64901. The next prime is 64921. The reversal of 64919 is 91946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64919 - 28 = 64663 is a prime.

It is a super-2 number, since 2×649192 = 8428953122, which contains 22 as substring.

Together with 64921, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 64891 and 64900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32459 + 32460.

It is an arithmetic number, because the mean of its divisors is an integer number (32460).

264919 is an apocalyptic number.

64919 is a deficient number, since it is larger than the sum of its proper divisors (1).

64919 is an equidigital number, since it uses as much as digits as its factorization.

64919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The square root of 64919 is about 254.7920720902. The cubic root of 64919 is about 40.1905491673.

The spelling of 64919 in words is "sixty-four thousand, nine hundred nineteen".