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1020643201 is a prime number
BaseRepresentation
bin111100110101011…
…100011110000001
32122010112001021001
4330311130132001
54042241040301
6245135532001
734202216104
oct7465343601
92563461231
101020643201
11484143386
1224598a001
131335b72b6
14997a273b
155e90cc01
hex3cd5c781

1020643201 has 2 divisors, whose sum is σ = 1020643202. Its totient is φ = 1020643200.

The previous prime is 1020643177. The next prime is 1020643231. The reversal of 1020643201 is 1023460201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 772895601 + 247747600 = 27801^2 + 15740^2 .

It is an emirp because it is prime and its reverse (1023460201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020643201 - 27 = 1020643073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020643231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510321600 + 510321601.

It is an arithmetic number, because the mean of its divisors is an integer number (510321601).

Almost surely, 21020643201 is an apocalyptic number.

It is an amenable number.

1020643201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020643201 is an equidigital number, since it uses as much as digits as its factorization.

1020643201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1020643201 is about 31947.5069606378. The cubic root of 1020643201 is about 1006.8342535755.

The spelling of 1020643201 in words is "one billion, twenty million, six hundred forty-three thousand, two hundred one".