616738249 has 2 divisors, whose sum is σ = 616738250. Its totient is φ = 616738248.

The previous prime is 616738229. The next prime is 616738279. The reversal of 616738249 is 942837616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 583560649 + 33177600 = 24157^2 + 5760^2 .

It is a cyclic number.

It is not a de Polignac number, because 616738249 - 2⁵ = 616738217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 616738199 and 616738208.

It is not a weakly prime, because it can be changed into another prime (616738229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308369124 + 308369125.

It is an arithmetic number, because the mean of its divisors is an integer number (308369125).

Almost surely, 2^616738249 is an apocalyptic number.

It is an amenable number.

616738249 is a deficient number, since it is larger than the sum of its proper divisors (1).

616738249 is an equidigital number, since it uses as much as digits as its factorization.

616738249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 616738249 is about 24834.2152885892. The cubic root of 616738249 is about 851.2039451308.

The spelling of 616738249 in words is "six hundred sixteen million, seven hundred thirty-eight thousand, two hundred forty-nine".