1601797 has 2 divisors, whose sum is σ = 1601798. Its totient is φ = 1601796.

The previous prime is 1601783. The next prime is 1601813. The reversal of 1601797 is 7971061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1515361 + 86436 = 1231^2 + 294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601797 is a prime.

1601797 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1601777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800898 + 800899.

It is an arithmetic number, because the mean of its divisors is an integer number (800899).

2^1601797 is an apocalyptic number.

It is an amenable number.

1601797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601797 is an equidigital number, since it uses as much as digits as its factorization.

1601797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 1601797 is about 1265.6211913523. The cubic root of 1601797 is about 117.0044803115.

It can be divided in two parts, 160179 and 7, that multiplied together give a triangular number (1121253 = T₁₄₉₇).

The spelling of 1601797 in words is "one million, six hundred one thousand, seven hundred ninety-seven".