616379977 has 2 divisors, whose sum is σ = 616379978. Its totient is φ = 616379976.

The previous prime is 616379879. The next prime is 616379989. The reversal of 616379977 is 779973616.

It is a happy number.

616379977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 615833856 + 546121 = 24816^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 616379977 - 2²³ = 607991369 is a prime.

It is not a weakly prime, because it can be changed into another prime (616379677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308189988 + 308189989.

It is an arithmetic number, because the mean of its divisors is an integer number (308189989).

Almost surely, 2^616379977 is an apocalyptic number.

It is an amenable number.

616379977 is a deficient number, since it is larger than the sum of its proper divisors (1).

616379977 is an equidigital number, since it uses as much as digits as its factorization.

616379977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000564, while the sum is 55.

The square root of 616379977 is about 24827.0009666895. Note that the first 3 decimals coincide. The cubic root of 616379977 is about 851.0390877207.

The spelling of 616379977 in words is "six hundred sixteen million, three hundred seventy-nine thousand, nine hundred seventy-seven".