1533397673 has 4 divisors (see below), whose sum is σ = 1569058128. Its totient is φ = 1497737220.

The previous prime is 1533397667. The next prime is 1533397709. The reversal of 1533397673 is 3767933351.

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.

It is a cyclic number.

It is not a de Polignac number, because 1533397673 - 2¹⁰ = 1533396649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1533397273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17830163 + ... + 17830248.

It is an arithmetic number, because the mean of its divisors is an integer number (392264532).

Almost surely, 2^1533397673 is an apocalyptic number.

It is an amenable number.

1533397673 is a deficient number, since it is larger than the sum of its proper divisors (35660455).

1533397673 is an equidigital number, since it uses as much as digits as its factorization.

1533397673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35660454.

The product of its digits is 1071630, while the sum is 47.

The square root of 1533397673 is about 39158.6219497060. The cubic root of 1533397673 is about 1153.1476898251.

The spelling of 1533397673 in words is "one billion, five hundred thirty-three million, three hundred ninety-seven thousand, six hundred seventy-three".