1933681 has 2 divisors, whose sum is σ = 1933682. Its totient is φ = 1933680.

The previous prime is 1933663. The next prime is 1933709. The reversal of 1933681 is 1863391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1915456 + 18225 = 1384^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1933681 - 2¹³ = 1925489 is a prime.

It is a super-2 number, since 2×1933681² = 7478244419522, which contains 22 as substring.

1933681 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1933661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 966840 + 966841.

It is an arithmetic number, because the mean of its divisors is an integer number (966841).

2^1933681 is an apocalyptic number.

It is an amenable number.

1933681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1933681 is an equidigital number, since it uses as much as digits as its factorization.

1933681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 1933681 is about 1390.5685887435. The cubic root of 1933681 is about 124.5838104949.

The spelling of 1933681 in words is "one million, nine hundred thirty-three thousand, six hundred eighty-one".