1964993 has 4 divisors (see below), whose sum is σ = 1997268. Its totient is φ = 1932720.

The previous prime is 1964987. The next prime is 1965077. The reversal of 1964993 is 3994691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3994691 = 31 ⋅128861.

It can be written as a sum of positive squares in 2 ways, for example, as 908209 + 1056784 = 953^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 1964993 - 2¹⁸ = 1702849 is a prime.

It is a super-2 number, since 2×1964993² = 7722394980098, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1964993.

It is not an unprimeable number, because it can be changed into a prime (1964983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16046 + ... + 16167.

It is an arithmetic number, because the mean of its divisors is an integer number (499317).

2^1964993 is an apocalyptic number.

It is an amenable number.

1964993 is a deficient number, since it is larger than the sum of its proper divisors (32275).

1964993 is an equidigital number, since it uses as much as digits as its factorization.

1964993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32274.

The product of its digits is 52488, while the sum is 41.

The square root of 1964993 is about 1401.7820800681. The cubic root of 1964993 is about 125.2526729071.

The spelling of 1964993 in words is "one million, nine hundred sixty-four thousand, nine hundred ninety-three".