1531249093 has 4 divisors (see below), whose sum is σ = 1670453568. Its totient is φ = 1392044620.

The previous prime is 1531249091. The next prime is 1531249117. The reversal of 1531249093 is 3909421351.

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 1531249093 - 2¹ = 1531249091 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 (1531249091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69602221 + ... + 69602242.

It is an arithmetic number, because the mean of its divisors is an integer number (417613392).

Almost surely, 2^1531249093 is an apocalyptic number.

It is an amenable number.

1531249093 is a deficient number, since it is larger than the sum of its proper divisors (139204475).

1531249093 is a wasteful number, since it uses less digits than its factorization.

1531249093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139204474.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 1531249093 is about 39131.1780170237. The cubic root of 1531249093 is about 1152.6088454409.

The spelling of 1531249093 in words is "one billion, five hundred thirty-one million, two hundred forty-nine thousand, ninety-three".