1663454429 has 16 divisors (see below), whose sum is σ = 2067217152. Its totient is φ = 1303354368.

The previous prime is 1663454423. The next prime is 1663454453. The reversal of 1663454429 is 9244543661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1663454429 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1663454429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663454423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79364 + ... + 98109.

It is an arithmetic number, because the mean of its divisors is an integer number (129201072).

Almost surely, 2^1663454429 is an apocalyptic number.

It is an amenable number.

1663454429 is a deficient number, since it is larger than the sum of its proper divisors (403762723).

1663454429 is a wasteful number, since it uses less digits than its factorization.

1663454429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177596.

The product of its digits is 622080, while the sum is 44.

The square root of 1663454429 is about 40785.4683557759. The cubic root of 1663454429 is about 1184.8689058394.

The spelling of 1663454429 in words is "one billion, six hundred sixty-three million, four hundred fifty-four thousand, four hundred twenty-nine".