1623361 has 2 divisors, whose sum is σ = 1623362. Its totient is φ = 1623360.

The previous prime is 1623319. The next prime is 1623367. The reversal of 1623361 is 1633261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1299600 + 323761 = 1140^2 + 569^2 .

It is a cyclic number.

It is not a de Polignac number, because 1623361 - 2⁷ = 1623233 is a prime.

It is an Ulam number.

It is a nialpdrome in base 6.

It is not a weakly prime, because it can be changed into another prime (1623367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811680 + 811681.

It is an arithmetic number, because the mean of its divisors is an integer number (811681).

2^1623361 is an apocalyptic number.

It is an amenable number.

1623361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1623361 is an equidigital number, since it uses as much as digits as its factorization.

1623361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

The square root of 1623361 is about 1274.1118475236. Note that the first 3 decimals coincide. The cubic root of 1623361 is about 117.5271945506.

It can be divided in two parts, 1623 and 361, that multiplied together give a triangular number (585903 = T₁₀₈₂).

The spelling of 1623361 in words is "one million, six hundred twenty-three thousand, three hundred sixty-one".