616906919 has 2 divisors, whose sum is σ = 616906920. Its totient is φ = 616906918.

The previous prime is 616906907. The next prime is 616906921. The reversal of 616906919 is 919609616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616906919 - 2¹² = 616902823 is a prime.

It is a super-2 number, since 2×616906919² = 761148293420145122, which contains 22 as substring.

Together with 616906921, it forms a pair of twin primes.

It is a Chen prime.

616906919 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616206919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308453459 + 308453460.

It is an arithmetic number, because the mean of its divisors is an integer number (308453460).

Almost surely, 2^616906919 is an apocalyptic number.

616906919 is a deficient number, since it is larger than the sum of its proper divisors (1).

616906919 is an equidigital number, since it uses as much as digits as its factorization.

616906919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 616906919 is about 24837.6109760983. The cubic root of 616906919 is about 851.2815358447.

The spelling of 616906919 in words is "six hundred sixteen million, nine hundred six thousand, nine hundred nineteen".