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64085921 is a prime number
BaseRepresentation
bin1111010001110…
…1111110100001
311110120220100122
43310131332201
5112401222141
610205330025
71405502264
oct364357641
9143526318
1064085921
11331a1779
1219566915
131037a983
148722cdb
15595d64b
hex3d1dfa1

64085921 has 2 divisors, whose sum is σ = 64085922. Its totient is φ = 64085920.

The previous prime is 64085893. The next prime is 64086007. The reversal of 64085921 is 12958046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62236321 + 1849600 = 7889^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 64085921 - 218 = 63823777 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32042960 + 32042961.

It is an arithmetic number, because the mean of its divisors is an integer number (32042961).

Almost surely, 264085921 is an apocalyptic number.

It is an amenable number.

64085921 is a deficient number, since it is larger than the sum of its proper divisors (1).

64085921 is an equidigital number, since it uses as much as digits as its factorization.

64085921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 64085921 is about 8005.3682613606. The cubic root of 64085921 is about 400.1789220387.

The spelling of 64085921 in words is "sixty-four million, eighty-five thousand, nine hundred twenty-one".