1616687 has 2 divisors, whose sum is σ = 1616688. Its totient is φ = 1616686.

The previous prime is 1616677. The next prime is 1616689. The reversal of 1616687 is 7866161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1616687 - 2⁶ = 1616623 is a prime.

It is a super-2 number, since 2×1616687² = 5227353711938, which contains 22 as substring.

Together with 1616689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1616689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808343 + 808344.

It is an arithmetic number, because the mean of its divisors is an integer number (808344).

2^1616687 is an apocalyptic number.

1616687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616687 is an equidigital number, since it uses as much as digits as its factorization.

1616687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 1616687 is about 1271.4900707438. The cubic root of 1616687 is about 117.3659131363.

The spelling of 1616687 in words is "one million, six hundred sixteen thousand, six hundred eighty-seven".