1656073 has 2 divisors, whose sum is σ = 1656074. Its totient is φ = 1656072.

The previous prime is 1656049. The next prime is 1656079. The reversal of 1656073 is 3706561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1505529 + 150544 = 1227^2 + 388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1656073 is a prime.

1656073 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1656079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828036 + 828037.

It is an arithmetic number, because the mean of its divisors is an integer number (828037).

2^1656073 is an apocalyptic number.

It is an amenable number.

1656073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656073 is an equidigital number, since it uses as much as digits as its factorization.

1656073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 1656073 is about 1286.8849987470. The cubic root of 1656073 is about 118.3113724152.

The spelling of 1656073 in words is "one million, six hundred fifty-six thousand, seventy-three".