1623397 has 4 divisors (see below), whose sum is σ = 1643040. Its totient is φ = 1603756.

The previous prime is 1623367. The next prime is 1623403. The reversal of 1623397 is 7933261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1623397 - 2⁷ = 1623269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623367) 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, 9697 + ... + 9862.

It is an arithmetic number, because the mean of its divisors is an integer number (410760).

2^1623397 is an apocalyptic number.

It is an amenable number.

1623397 is a deficient number, since it is larger than the sum of its proper divisors (19643).

1623397 is an equidigital number, since it uses as much as digits as its factorization.

1623397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19642.

The product of its digits is 6804, while the sum is 31.

The square root of 1623397 is about 1274.1259749334. The cubic root of 1623397 is about 117.5280633135.

The spelling of 1623397 in words is "one million, six hundred twenty-three thousand, three hundred ninety-seven".