1520404063 has 8 divisors (see below), whose sum is σ = 1524928032. Its totient is φ = 1515888096.

The previous prime is 1520404007. The next prime is 1520404079. The reversal of 1520404063 is 3604040251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1520404063 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 (1520404463) 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 7 ways as a sum of consecutive naturals, for example, 643881 + ... + 646237.

It is an arithmetic number, because the mean of its divisors is an integer number (190616004).

Almost surely, 2^1520404063 is an apocalyptic number.

1520404063 is a deficient number, since it is larger than the sum of its proper divisors (4523969).

1520404063 is an equidigital number, since it uses as much as digits as its factorization.

1520404063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1520404063 is about 38992.3590335337. The cubic root of 1520404063 is about 1149.8812890695.

The spelling of 1520404063 in words is "one billion, five hundred twenty million, four hundred four thousand, sixty-three".