1977047 has 4 divisors (see below), whose sum is σ = 1991616. Its totient is φ = 1962480.

The previous prime is 1977023. The next prime is 1977067. The reversal of 1977047 is 7407791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1977047 - 2⁶ = 1976983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1976998 and 1977016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7079 + ... + 7352.

It is an arithmetic number, because the mean of its divisors is an integer number (497904).

2^1977047 is an apocalyptic number.

1977047 is a deficient number, since it is larger than the sum of its proper divisors (14569).

1977047 is a wasteful number, since it uses less digits than its factorization.

1977047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14568.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 1977047 is about 1406.0750335597. The cubic root of 1977047 is about 125.5082665200.

The spelling of 1977047 in words is "one million, nine hundred seventy-seven thousand, forty-seven".