1977343 has 2 divisors, whose sum is σ = 1977344. Its totient is φ = 1977342.

The previous prime is 1977329. The next prime is 1977359. The reversal of 1977343 is 3437791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1977343 - 2⁹ = 1976831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1977299 and 1977308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1977323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988671 + 988672.

It is an arithmetic number, because the mean of its divisors is an integer number (988672).

2^1977343 is an apocalyptic number.

1977343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977343 is an equidigital number, since it uses as much as digits as its factorization.

1977343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 34.

The square root of 1977343 is about 1406.1802871609. The cubic root of 1977343 is about 125.5145298331.

The spelling of 1977343 in words is "one million, nine hundred seventy-seven thousand, three hundred forty-three".