1977977 has 4 divisors (see below), whose sum is σ = 2064000. Its totient is φ = 1891956.

The previous prime is 1977971. The next prime is 1977979. The reversal of 1977977 is 7797791.

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 1977977 - 2⁴ = 1977961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1977971) 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, 42977 + ... + 43022.

It is an arithmetic number, because the mean of its divisors is an integer number (516000).

2^1977977 is an apocalyptic number.

It is an amenable number.

1977977 is a deficient number, since it is larger than the sum of its proper divisors (86023).

1977977 is an equidigital number, since it uses as much as digits as its factorization.

1977977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86022.

The product of its digits is 194481, while the sum is 47.

The square root of 1977977 is about 1406.4057024913. The cubic root of 1977977 is about 125.5279430697.

The spelling of 1977977 in words is "one million, nine hundred seventy-seven thousand, nine hundred seventy-seven".