1976989 has 4 divisors (see below), whose sum is σ = 2259424. Its totient is φ = 1694556.

The previous prime is 1976987. The next prime is 1976993. The reversal of 1976989 is 9896791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1976989 - 2¹ = 1976987 is a prime.

It is a super-2 number, since 2×1976989² = 7816971012242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1976983) 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, 141207 + ... + 141220.

It is an arithmetic number, because the mean of its divisors is an integer number (564856).

2^1976989 is an apocalyptic number.

It is an amenable number.

1976989 is a deficient number, since it is larger than the sum of its proper divisors (282435).

1976989 is an equidigital number, since it uses as much as digits as its factorization.

1976989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282434.

The product of its digits is 244944, while the sum is 49.

The square root of 1976989 is about 1406.0544086201. The cubic root of 1976989 is about 125.5070391760.

The spelling of 1976989 in words is "one million, nine hundred seventy-six thousand, nine hundred eighty-nine".