2345689 has 4 divisors (see below), whose sum is σ = 2409124. Its totient is φ = 2282256.

The previous prime is 2345669. The next prime is 2345699. The reversal of 2345689 is 9865432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1550025 + 795664 = 1245^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 2345689 - 2⁵ = 2345657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 63397 = 2345689 / (2 + 3 + 4 + 5 + 6 + 8 + 9).

It is a d-powerful number, because it can be written as 2¹⁷ + 3¹³ + 4⁹ + 5⁷ + 6⁷ + 8 + 9² .

It is a Duffinian number.

2345689 is a lucky number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2345659) 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, 31662 + ... + 31735.

It is an arithmetic number, because the mean of its divisors is an integer number (602281).

2^2345689 is an apocalyptic number.

It is an amenable number.

2345689 is a deficient number, since it is larger than the sum of its proper divisors (63435).

2345689 is an equidigital number, since it uses as much as digits as its factorization.

2345689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63434.

The product of its digits is 51840, while the sum is 37.

The square root of 2345689 is about 1531.5642330637. The cubic root of 2345689 is about 132.8689420724.

It can be divided in two parts, 234568 and 9, that multiplied together give a palindrome (2111112).

The spelling of 2345689 in words is "two million, three hundred forty-five thousand, six hundred eighty-nine".