616506001 has 2 divisors, whose sum is σ = 616506002. Its totient is φ = 616506000.

The previous prime is 616505999. The next prime is 616506019. The reversal of 616506001 is 100605616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536385600 + 80120401 = 23160^2 + 8951^2 .

It is a cyclic number.

It is not a de Polignac number, because 616506001 - 2¹ = 616505999 is a prime.

Together with 616505999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (616506601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308253000 + 308253001.

It is an arithmetic number, because the mean of its divisors is an integer number (308253001).

Almost surely, 2^616506001 is an apocalyptic number.

It is an amenable number.

616506001 is a deficient number, since it is larger than the sum of its proper divisors (1).

616506001 is an equidigital number, since it uses as much as digits as its factorization.

616506001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 616506001 is about 24829.5388801323. The cubic root of 616506001 is about 851.0970844356.

The spelling of 616506001 in words is "six hundred sixteen million, five hundred six thousand, one".