1623197 has 2 divisors, whose sum is σ = 1623198. Its totient is φ = 1623196.

The previous prime is 1623173. The next prime is 1623203. The reversal of 1623197 is 7913261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1623076 + 121 = 1274^2 + 11^2 .

It is an emirp because it is prime and its reverse (7913261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1623197 - 2¹⁸ = 1361053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1623107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811598 + 811599.

It is an arithmetic number, because the mean of its divisors is an integer number (811599).

2^1623197 is an apocalyptic number.

It is an amenable number.

1623197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623197 is an equidigital number, since it uses as much as digits as its factorization.

1623197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 1623197 is about 1274.0474873410. The cubic root of 1623197 is about 117.5232366901.

Subtracting 1623197 from its reverse (7913261), we obtain a square (6290064 = 2508²).

The spelling of 1623197 in words is "one million, six hundred twenty-three thousand, one hundred ninety-seven".