616782149 has 2 divisors, whose sum is σ = 616782150. Its totient is φ = 616782148.

The previous prime is 616782143. The next prime is 616782167. The reversal of 616782149 is 941287616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354568900 + 262213249 = 18830^2 + 16193^2 .

It is a cyclic number.

It is not a de Polignac number, because 616782149 - 2¹⁶ = 616716613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616782143) 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 as a sum of consecutive naturals, namely, 308391074 + 308391075.

It is an arithmetic number, because the mean of its divisors is an integer number (308391075).

Almost surely, 2^616782149 is an apocalyptic number.

It is an amenable number.

616782149 is a deficient number, since it is larger than the sum of its proper divisors (1).

616782149 is an equidigital number, since it uses as much as digits as its factorization.

616782149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 616782149 is about 24835.0991340884. The cubic root of 616782149 is about 851.2241411468.

The spelling of 616782149 in words is "six hundred sixteen million, seven hundred eighty-two thousand, one hundred forty-nine".