1623147 has 4 divisors (see below), whose sum is σ = 2164200. Its totient is φ = 1082096.

The previous prime is 1623137. The next prime is 1623157. The reversal of 1623147 is 7413261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7413261 = 3 ⋅2471087.

It is an interprime number because it is at equal distance from previous prime (1623137) and next prime (1623157).

It is a cyclic number.

It is not a de Polignac number, because 1623147 - 2¹⁴ = 1606763 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1623107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270522 + ... + 270527.

It is an arithmetic number, because the mean of its divisors is an integer number (541050).

2^1623147 is an apocalyptic number.

1623147 is a deficient number, since it is larger than the sum of its proper divisors (541053).

1623147 is an equidigital number, since it uses as much as digits as its factorization.

1623147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541052.

The product of its digits is 1008, while the sum is 24.

The square root of 1623147 is about 1274.0278646874. The cubic root of 1623147 is about 117.5220299723.

It can be divided in two parts, 1623 and 147, that added together give a triangular number (1770 = T₅₉).

The spelling of 1623147 in words is "one million, six hundred twenty-three thousand, one hundred forty-seven".