1659423953 has 8 divisors (see below), whose sum is σ = 1812490176. Its totient is φ = 1506726000.

The previous prime is 1659423943. The next prime is 1659423967. The reversal of 1659423953 is 3593249561.

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 1659423953 - 2⁴ = 1659423937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1659423898 and 1659423907.

It is not an unprimeable number, because it can be changed into a prime (1659423943) 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, 82598 + ... + 100703.

It is an arithmetic number, because the mean of its divisors is an integer number (226561272).

Almost surely, 2^1659423953 is an apocalyptic number.

It is an amenable number.

1659423953 is a deficient number, since it is larger than the sum of its proper divisors (153066223).

1659423953 is a wasteful number, since it uses less digits than its factorization.

1659423953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184135.

The product of its digits is 874800, while the sum is 47.

The square root of 1659423953 is about 40736.0277027596. The cubic root of 1659423953 is about 1183.9111703753.

The spelling of 1659423953 in words is "one billion, six hundred fifty-nine million, four hundred twenty-three thousand, nine hundred fifty-three".