1906613 has 2 divisors, whose sum is σ = 1906614. Its totient is φ = 1906612.

The previous prime is 1906607. The next prime is 1906621. The reversal of 1906613 is 3166091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1385329 + 521284 = 1177^2 + 722^2 .

It is a cyclic number.

It is not a de Polignac number, because 1906613 - 2¹² = 1902517 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 (1906603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953306 + 953307.

It is an arithmetic number, because the mean of its divisors is an integer number (953307).

2^1906613 is an apocalyptic number.

It is an amenable number.

1906613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906613 is an equidigital number, since it uses as much as digits as its factorization.

1906613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1906613 is about 1380.8015787940. The cubic root of 1906613 is about 123.9997615327. Note that the first 3 decimals are identical.

The spelling of 1906613 in words is "one million, nine hundred six thousand, six hundred thirteen".