1977009 has 8 divisors (see below), whose sum is σ = 2657280. Its totient is φ = 1307376.

The previous prime is 1976993. The next prime is 1977023. The reversal of 1977009 is 9007791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1977009 - 2⁴ = 1976993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1977089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2214 + ... + 2975.

It is an arithmetic number, because the mean of its divisors is an integer number (332160).

2^1977009 is an apocalyptic number.

It is an amenable number.

1977009 is a deficient number, since it is larger than the sum of its proper divisors (680271).

1977009 is a wasteful number, since it uses less digits than its factorization.

1977009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5319.

The product of its (nonzero) digits is 3969, while the sum is 33.

The square root of 1977009 is about 1406.0615207024. The cubic root of 1977009 is about 125.5074624008.

It can be divided in two parts, 19 and 77009, that added together give a triangular number (77028 = T₃₉₂).

The spelling of 1977009 in words is "one million, nine hundred seventy-seven thousand, nine".