1920769 has 2 divisors, whose sum is σ = 1920770. Its totient is φ = 1920768.

The previous prime is 1920761. The next prime is 1920797. The reversal of 1920769 is 9670291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1575025 + 345744 = 1255^2 + 588^2 .

It is an emirp because it is prime and its reverse (9670291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1920769 - 2³ = 1920761 is a prime.

It is a super-2 number, since 2×1920769² = 7378707102722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1920761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960384 + 960385.

It is an arithmetic number, because the mean of its divisors is an integer number (960385).

2^1920769 is an apocalyptic number.

It is an amenable number.

1920769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920769 is an equidigital number, since it uses as much as digits as its factorization.

1920769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 1920769 is about 1385.9181072488. The cubic root of 1920769 is about 124.3058915080.

The spelling of 1920769 in words is "one million, nine hundred twenty thousand, seven hundred sixty-nine".