616182421 has 2 divisors, whose sum is σ = 616182422. Its totient is φ = 616182420.

The previous prime is 616182377. The next prime is 616182431. The reversal of 616182421 is 124281616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 497067025 + 119115396 = 22295^2 + 10914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616182421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616182431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308091210 + 308091211.

It is an arithmetic number, because the mean of its divisors is an integer number (308091211).

Almost surely, 2^616182421 is an apocalyptic number.

It is an amenable number.

616182421 is a deficient number, since it is larger than the sum of its proper divisors (1).

616182421 is an equidigital number, since it uses as much as digits as its factorization.

616182421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

The square root of 616182421 is about 24823.0219957200. The cubic root of 616182421 is about 850.9481558012.

The spelling of 616182421 in words is "six hundred sixteen million, one hundred eighty-two thousand, four hundred twenty-one".