616926197 has 4 divisors (see below), whose sum is σ = 633599916. Its totient is φ = 600252480.

The previous prime is 616926119. The next prime is 616926199. The reversal of 616926197 is 791629616.

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 517744516 + 99181681 = 22754^2 + 9959^2 .

It is not a de Polignac number, because 616926197 - 2¹⁰ = 616925173 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 (616926199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8336804 + ... + 8336877.

It is an arithmetic number, because the mean of its divisors is an integer number (158399979).

Almost surely, 2^616926197 is an apocalyptic number.

It is an amenable number.

616926197 is a deficient number, since it is larger than the sum of its proper divisors (16673719).

616926197 is a wasteful number, since it uses less digits than its factorization.

616926197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16673718.

The product of its digits is 244944, while the sum is 47.

The square root of 616926197 is about 24837.9990538691. Note that the first 3 decimals coincide. The cubic root of 616926197 is about 851.2904031113.

Adding to 616926197 its sum of digits (47), we get a square (616926244 = 24838²).

The spelling of 616926197 in words is "six hundred sixteen million, nine hundred twenty-six thousand, one hundred ninety-seven".