616221607 has 4 divisors (see below), whose sum is σ = 617404896. Its totient is φ = 615038320.

The previous prime is 616221601. The next prime is 616221629. The reversal of 616221607 is 706122616.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 616221607 - 2¹¹ = 616219559 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 (616221601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590863 + ... + 591904.

It is an arithmetic number, because the mean of its divisors is an integer number (154351224).

Almost surely, 2^616221607 is an apocalyptic number.

616221607 is a deficient number, since it is larger than the sum of its proper divisors (1183289).

616221607 is a wasteful number, since it uses less digits than its factorization.

616221607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183288.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 616221607 is about 24823.8112907748. The cubic root of 616221607 is about 850.9661940457.

The spelling of 616221607 in words is "six hundred sixteen million, two hundred twenty-one thousand, six hundred seven".