1697522401 has 3 divisors (see below), whose sum is σ = 1697563603. Its totient is φ = 1697481200.

The previous prime is 1697522399. The next prime is 1697522413. The reversal of 1697522401 is 1042257961.

The square root of 1697522401 is 41201.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1042257961 = 18713 ⋅55697.

It can be written as a sum of positive squares in only one way, i.e., 1444076001 + 253446400 = 38001^2 + 15920^2 .

It is not a de Polignac number, because 1697522401 - 2¹ = 1697522399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1697522501) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 20601 + ... + 61801.

Almost surely, 2^1697522401 is an apocalyptic number.

1697522401 is the 41201-st square number.

1697522401 is the 20601-st centered octagonal number.

It is an amenable number.

1697522401 is a deficient number, since it is larger than the sum of its proper divisors (41202).

1697522401 is an frugal number, since it uses more digits than its factorization.

1697522401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82402 (or 41201 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The cubic root of 1697522401 is about 1192.9031114498.

The spelling of 1697522401 in words is "one billion, six hundred ninety-seven million, five hundred twenty-two thousand, four hundred one".