616388897 has 8 divisors (see below), whose sum is σ = 625121280. Its totient is φ = 607714240.

The previous prime is 616388869. The next prime is 616388909. The reversal of 616388897 is 798883616.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 616388897 - 2⁶ = 616388833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616388807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7304 + ... + 35862.

It is an arithmetic number, because the mean of its divisors is an integer number (78140160).

Almost surely, 2^616388897 is an apocalyptic number.

It is an amenable number.

616388897 is a deficient number, since it is larger than the sum of its proper divisors (8732383).

616388897 is a wasteful number, since it uses less digits than its factorization.

616388897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28863.

The product of its digits is 3483648, while the sum is 56.

The square root of 616388897 is about 24827.1806091630. The cubic root of 616388897 is about 851.0431929980.

The spelling of 616388897 in words is "six hundred sixteen million, three hundred eighty-eight thousand, eight hundred ninety-seven".