1653542903 has 4 divisors (see below), whose sum is σ = 1653797880. Its totient is φ = 1653287928.

The previous prime is 1653542881. The next prime is 1653542923. The reversal of 1653542903 is 3092453561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3092453561 = 17 ⋅181909033.

It is a cyclic number.

It is not a de Polignac number, because 1653542903 - 2¹⁶ = 1653477367 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 (1653542923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117500 + ... + 130817.

It is an arithmetic number, because the mean of its divisors is an integer number (413449470).

Almost surely, 2^1653542903 is an apocalyptic number.

1653542903 is a deficient number, since it is larger than the sum of its proper divisors (254977).

1653542903 is an equidigital number, since it uses as much as digits as its factorization.

1653542903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254976.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 1653542903 is about 40663.7787594808. The cubic root of 1653542903 is about 1182.5109089009.

The spelling of 1653542903 in words is "one billion, six hundred fifty-three million, five hundred forty-two thousand, nine hundred three".