616965149 has 2 divisors, whose sum is σ = 616965150. Its totient is φ = 616965148.

The previous prime is 616965113. The next prime is 616965157. The reversal of 616965149 is 941569616.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 509179225 + 107785924 = 22565^2 + 10382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616965149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616965199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308482574 + 308482575.

It is an arithmetic number, because the mean of its divisors is an integer number (308482575).

Almost surely, 2^616965149 is an apocalyptic number.

It is an amenable number.

616965149 is a deficient number, since it is larger than the sum of its proper divisors (1).

616965149 is an equidigital number, since it uses as much as digits as its factorization.

616965149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 616965149 is about 24838.7831626269. The cubic root of 616965149 is about 851.3083192284.

The spelling of 616965149 in words is "six hundred sixteen million, nine hundred sixty-five thousand, one hundred forty-nine".