1920977 has 4 divisors (see below), whose sum is σ = 1982976. Its totient is φ = 1858980.

The previous prime is 1920959. The next prime is 1920991. The reversal of 1920977 is 7790291.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7790291 = 67 ⋅116273.

It is a cyclic number.

It is not a de Polignac number, because 1920977 - 2⁶ = 1920913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1920917) 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, 30953 + ... + 31014.

It is an arithmetic number, because the mean of its divisors is an integer number (495744).

2^1920977 is an apocalyptic number.

It is an amenable number.

1920977 is a deficient number, since it is larger than the sum of its proper divisors (61999).

1920977 is an equidigital number, since it uses as much as digits as its factorization.

1920977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61998.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 1920977 is about 1385.9931457262. The cubic root of 1920977 is about 124.3103783728.

The spelling of 1920977 in words is "one million, nine hundred twenty thousand, nine hundred seventy-seven".