2001969 has 16 divisors (see below), whose sum is σ = 3024000. Its totient is φ = 1308528.

The previous prime is 2001953. The next prime is 2001977. The reversal of 2001969 is 9691002.

It is a happy number.

It is not a de Polignac number, because 2001969 - 2⁴ = 2001953 is a prime.

It is a super-2 number, since 2×2001969² = 8015759753922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2001919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 732 + ... + 2130.

It is an arithmetic number, because the mean of its divisors is an integer number (189000).

2^2001969 is an apocalyptic number.

It is an amenable number.

2001969 is a deficient number, since it is larger than the sum of its proper divisors (1022031).

2001969 is a wasteful number, since it uses less digits than its factorization.

2001969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461 (or 1455 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 2001969 is about 1414.9095377444. The cubic root of 2001969 is about 126.0334378375.

2001969 divided by its sum of digits (27) gives a palindrome (74147).

The spelling of 2001969 in words is "two million, one thousand, nine hundred sixty-nine".