616421087 has 2 divisors, whose sum is σ = 616421088. Its totient is φ = 616421086.

The previous prime is 616421083. The next prime is 616421131. The reversal of 616421087 is 780124616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 616421087 - 2² = 616421083 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616421083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308210543 + 308210544.

It is an arithmetic number, because the mean of its divisors is an integer number (308210544).

Almost surely, 2^616421087 is an apocalyptic number.

616421087 is a deficient number, since it is larger than the sum of its proper divisors (1).

616421087 is an equidigital number, since it uses as much as digits as its factorization.

616421087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 616421087 is about 24827.8288821234. The cubic root of 616421087 is about 851.0580075648.

The spelling of 616421087 in words is "six hundred sixteen million, four hundred twenty-one thousand, eighty-seven".