1863401 has 2 divisors, whose sum is σ = 1863402. Its totient is φ = 1863400.

The previous prime is 1863377. The next prime is 1863403. The reversal of 1863401 is 1043681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1628176 + 235225 = 1276^2 + 485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1863401 is a prime.

It is a Sophie Germain prime.

Together with 1863403, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1863403) 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, 931700 + 931701.

It is an arithmetic number, because the mean of its divisors is an integer number (931701).

2^1863401 is an apocalyptic number.

It is an amenable number.

1863401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1863401 is an equidigital number, since it uses as much as digits as its factorization.

1863401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1863401 is about 1365.0644673421. The cubic root of 1863401 is about 123.0558056417.

The spelling of 1863401 in words is "one million, eight hundred sixty-three thousand, four hundred one".