1977223 has 2 divisors, whose sum is σ = 1977224. Its totient is φ = 1977222.

The previous prime is 1977203. The next prime is 1977233. The reversal of 1977223 is 3227791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1977223 - 2¹³ = 1969031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1977203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988611 + 988612.

It is an arithmetic number, because the mean of its divisors is an integer number (988612).

2^1977223 is an apocalyptic number.

1977223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977223 is an equidigital number, since it uses as much as digits as its factorization.

1977223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 31.

The square root of 1977223 is about 1406.1376177316. The cubic root of 1977223 is about 125.5119907275.

The spelling of 1977223 in words is "one million, nine hundred seventy-seven thousand, two hundred twenty-three".