616427397 has 12 divisors (see below), whose sum is σ = 890907264. Its totient is φ = 410715240.

The previous prime is 616427377. The next prime is 616427407. The reversal of 616427397 is 793724616.

616427397 is a `hidden beast` number, since 616 + 4 + 27 + 3 + 9 + 7 = 666.

It is not a de Polignac number, because 616427397 - 2¹⁰ = 616426373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616427377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2379 + ... + 35192.

It is an arithmetic number, because the mean of its divisors is an integer number (74242272).

Almost surely, 2^616427397 is an apocalyptic number.

It is an amenable number.

616427397 is a deficient number, since it is larger than the sum of its proper divisors (274479867).

616427397 is a wasteful number, since it uses less digits than its factorization.

616427397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39400 (or 39397 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 616427397 is about 24827.9559569450. The cubic root of 616427397 is about 851.0609115092.

The spelling of 616427397 in words is "six hundred sixteen million, four hundred twenty-seven thousand, three hundred ninety-seven".