1656906103 has 4 divisors (see below), whose sum is σ = 1662802848. Its totient is φ = 1651009360.

The previous prime is 1656906079. The next prime is 1656906133. The reversal of 1656906103 is 3016096561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3016096561 = 54919².

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1656906103 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 (1656906133) 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, 2947951 + ... + 2948512.

It is an arithmetic number, because the mean of its divisors is an integer number (415700712).

Almost surely, 2^1656906103 is an apocalyptic number.

1656906103 is a deficient number, since it is larger than the sum of its proper divisors (5896745).

1656906103 is an equidigital number, since it uses as much as digits as its factorization.

1656906103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5896744.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 1656906103 is about 40705.1115094898. Note that the first 3 decimals coincide. The cubic root of 1656906103 is about 1183.3120830322.

The spelling of 1656906103 in words is "one billion, six hundred fifty-six million, nine hundred six thousand, one hundred three".