1655597 has 2 divisors, whose sum is σ = 1655598. Its totient is φ = 1655596.

The previous prime is 1655593. The next prime is 1655623. The reversal of 1655597 is 7955561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1406596 + 249001 = 1186^2 + 499^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655597 - 2² = 1655593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1655597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1655593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827798 + 827799.

It is an arithmetic number, because the mean of its divisors is an integer number (827799).

2^1655597 is an apocalyptic number.

It is an amenable number.

1655597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655597 is an equidigital number, since it uses as much as digits as its factorization.

1655597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47250, while the sum is 38.

The square root of 1655597 is about 1286.7000427450. The cubic root of 1655597 is about 118.3000360370.

The spelling of 1655597 in words is "one million, six hundred fifty-five thousand, five hundred ninety-seven".