1863493 has 2 divisors, whose sum is σ = 1863494. Its totient is φ = 1863492.

The previous prime is 1863481. The next prime is 1863497. The reversal of 1863493 is 3943681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1595169 + 268324 = 1263^2 + 518^2 .

It is a cyclic number.

It is not a de Polignac number, because 1863493 - 2⁵ = 1863461 is a prime.

It is a super-2 number, since 2×1863493² = 6945212322098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1863497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 931746 + 931747.

It is an arithmetic number, because the mean of its divisors is an integer number (931747).

2^1863493 is an apocalyptic number.

It is an amenable number.

1863493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1863493 is an equidigital number, since it uses as much as digits as its factorization.

1863493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 1863493 is about 1365.0981649684. The cubic root of 1863493 is about 123.0578307825.

The spelling of 1863493 in words is "one million, eight hundred sixty-three thousand, four hundred ninety-three".