623149 has 4 divisors (see below), whose sum is σ = 627136. Its totient is φ = 619164.

The previous prime is 623107. The next prime is 623171. The reversal of 623149 is 941326.

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, and also an emirpimes, since its reverse is a distinct semiprime: 941326 = 2 ⋅470663.

It is a cyclic number.

It is not a de Polignac number, because 623149 - 2⁹ = 622637 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 (624149) 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, 1749 + ... + 2074.

It is an arithmetic number, because the mean of its divisors is an integer number (156784).

2⁶²³¹⁴⁹ is an apocalyptic number.

It is an amenable number.

623149 is a deficient number, since it is larger than the sum of its proper divisors (3987).

623149 is a wasteful number, since it uses less digits than its factorization.

623149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986.

The product of its digits is 1296, while the sum is 25.

The square root of 623149 is about 789.3978717985. The cubic root of 623149 is about 85.4143094597.

The spelling of 623149 in words is "six hundred twenty-three thousand, one hundred forty-nine".