616777393 has 4 divisors (see below), whose sum is σ = 616849920. Its totient is φ = 616704868.

The previous prime is 616777363. The next prime is 616777397. The reversal of 616777393 is 393777616.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 616777393 - 2¹³ = 616769201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616777397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21505 + ... + 41182.

It is an arithmetic number, because the mean of its divisors is an integer number (154212480).

Almost surely, 2^616777393 is an apocalyptic number.

It is an amenable number.

616777393 is a deficient number, since it is larger than the sum of its proper divisors (72527).

616777393 is an equidigital number, since it uses as much as digits as its factorization.

616777393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72526.

The product of its digits is 1000188, while the sum is 49.

The square root of 616777393 is about 24835.0033823231. The cubic root of 616777393 is about 851.2219532147.

The spelling of 616777393 in words is "six hundred sixteen million, seven hundred seventy-seven thousand, three hundred ninety-three".