1623955 has 4 divisors (see below), whose sum is σ = 1948752. Its totient is φ = 1299160.

The previous prime is 1623943. The next prime is 1623977. The reversal of 1623955 is 5593261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5593261 = 41 ⋅136421.

It is not a de Polignac number, because 1623955 - 2⁷ = 1623827 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162391 + ... + 162400.

It is an arithmetic number, because the mean of its divisors is an integer number (487188).

2^1623955 is an apocalyptic number.

1623955 is a deficient number, since it is larger than the sum of its proper divisors (324797).

1623955 is an equidigital number, since it uses as much as digits as its factorization.

1623955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324796.

The product of its digits is 8100, while the sum is 31.

The square root of 1623955 is about 1274.3449297580. The cubic root of 1623955 is about 117.5415274973.

The spelling of 1623955 in words is "one million, six hundred twenty-three thousand, nine hundred fifty-five".