616821297 has 8 divisors (see below), whose sum is σ = 822545856. Its totient is φ = 411155472.

The previous prime is 616821281. The next prime is 616821323. The reversal of 616821297 is 792128616.

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

It is not a de Polignac number, because 616821297 - 2⁴ = 616821281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616821277) 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, 25663 + ... + 43499.

It is an arithmetic number, because the mean of its divisors is an integer number (102818232).

Almost surely, 2^616821297 is an apocalyptic number.

It is an amenable number.

616821297 is a deficient number, since it is larger than the sum of its proper divisors (205724559).

616821297 is a wasteful number, since it uses less digits than its factorization.

616821297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29367.

The product of its digits is 72576, while the sum is 42.

The square root of 616821297 is about 24835.8872803047. The cubic root of 616821297 is about 851.2421502162.

The spelling of 616821297 in words is "six hundred sixteen million, eight hundred twenty-one thousand, two hundred ninety-seven".