4391625997 has 16 divisors (see below), whose sum is σ = 5180620032. Its totient is φ = 3677585920.

The previous prime is 4391625983. The next prime is 4391626013. The reversal of 4391625997 is 7995261934.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4391625997 - 2⁷ = 4391625869 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 (4391625697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241048 + ... + 258625.

It is an arithmetic number, because the mean of its divisors is an integer number (323788752).

Almost surely, 2^4391625997 is an apocalyptic number.

4391625997 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

4391625997 is a deficient number, since it is larger than the sum of its proper divisors (788994035).

4391625997 is a wasteful number, since it uses less digits than its factorization.

4391625997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499748.

The product of its digits is 3674160, while the sum is 55.

The square root of 4391625997 is about 66269.3443229975. The cubic root of 4391625997 is about 1637.6023357523.

The spelling of 4391625997 in words is "four billion, three hundred ninety-one million, six hundred twenty-five thousand, nine hundred ninety-seven".