1601600997 has 8 divisors (see below), whose sum is σ = 2144876256. Its totient is φ = 1063029872.

The previous prime is 1601600993. The next prime is 1601601007. The reversal of 1601600997 is 7990061061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1601600997 - 2² = 1601600993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601600993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175238 + ... + 1176599.

It is an arithmetic number, because the mean of its divisors is an integer number (268109532).

Almost surely, 2^1601600997 is an apocalyptic number.

It is an amenable number.

1601600997 is a deficient number, since it is larger than the sum of its proper divisors (543275259).

1601600997 is a wasteful number, since it uses less digits than its factorization.

1601600997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2352067.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 1601600997 is about 40020.0074587699. The cubic root of 1601600997 is about 1169.9970772080.

The spelling of 1601600997 in words is "one billion, six hundred one million, six hundred thousand, nine hundred ninety-seven".