1656009793 has 4 divisors (see below), whose sum is σ = 1656134320. Its totient is φ = 1655885268.

The previous prime is 1656009731. The next prime is 1656009829. The reversal of 1656009793 is 3979006561.

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: 3979006561 = 211 ⋅18857851.

It is a cyclic number.

It is not a de Polignac number, because 1656009793 - 2⁹ = 1656009281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1656009193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39555 + ... + 69832.

It is an arithmetic number, because the mean of its divisors is an integer number (414033580).

Almost surely, 2^1656009793 is an apocalyptic number.

It is an amenable number.

1656009793 is a deficient number, since it is larger than the sum of its proper divisors (124527).

1656009793 is a wasteful number, since it uses less digits than its factorization.

1656009793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124526.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 1656009793 is about 40694.1002234968. The cubic root of 1656009793 is about 1183.0986720737.

The spelling of 1656009793 in words is "one billion, six hundred fifty-six million, nine thousand, seven hundred ninety-three".