1606562197 has 4 divisors (see below), whose sum is σ = 1658386816. Its totient is φ = 1554737580.

The previous prime is 1606562189. The next prime is 1606562201. The reversal of 1606562197 is 7912656061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7912656061 = 29 ⋅272850209.

It is a cyclic number.

It is not a de Polignac number, because 1606562197 - 2³ = 1606562189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606562117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25912263 + ... + 25912324.

It is an arithmetic number, because the mean of its divisors is an integer number (414596704).

Almost surely, 2^1606562197 is an apocalyptic number.

It is an amenable number.

1606562197 is a deficient number, since it is larger than the sum of its proper divisors (51824619).

1606562197 is an equidigital number, since it uses as much as digits as its factorization.

1606562197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51824618.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1606562197 is about 40081.9435282273. The cubic root of 1606562197 is about 1171.2039125920.

The spelling of 1606562197 in words is "one billion, six hundred six million, five hundred sixty-two thousand, one hundred ninety-seven".