1937993 has 2 divisors, whose sum is σ = 1937994. Its totient is φ = 1937992.

The previous prime is 1937989. The next prime is 1938007. The reversal of 1937993 is 3997391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1926544 + 11449 = 1388^2 + 107^2 .

It is a cyclic number.

It is not a de Polignac number, because 1937993 - 2² = 1937989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 1937993.

It is not a weakly prime, because it can be changed into another prime (1937933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 968996 + 968997.

It is an arithmetic number, because the mean of its divisors is an integer number (968997).

2^1937993 is an apocalyptic number.

It is an amenable number.

1937993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1937993 is an equidigital number, since it uses as much as digits as its factorization.

1937993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45927, while the sum is 41.

The square root of 1937993 is about 1392.1181702715. The cubic root of 1937993 is about 124.6763467117.

The spelling of 1937993 in words is "one million, nine hundred thirty-seven thousand, nine hundred ninety-three".