616445 has 4 divisors (see below), whose sum is σ = 739740. Its totient is φ = 493152.

The previous prime is 616439. The next prime is 616459. The reversal of 616445 is 544616.

It is a happy number.

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 151321 + 465124 = 389^2 + 682^2 .

It is a cyclic number.

It is not a de Polignac number, because 616445 - 2¹² = 612349 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61640 + ... + 61649.

It is an arithmetic number, because the mean of its divisors is an integer number (184935).

2⁶¹⁶⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

616445 is a deficient number, since it is larger than the sum of its proper divisors (123295).

616445 is a wasteful number, since it uses less digits than its factorization.

616445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123294.

The product of its digits is 2880, while the sum is 26.

The square root of 616445 is about 785.1401148840. The cubic root of 616445 is about 85.1069012535.

The spelling of 616445 in words is "six hundred sixteen thousand, four hundred forty-five".