157531093 has 2 divisors, whose sum is σ = 157531094. Its totient is φ = 157531092.

The previous prime is 157531091. The next prime is 157531133. The reversal of 157531093 is 390135751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155700484 + 1830609 = 12478^2 + 1353^2 .

It is an emirp because it is prime and its reverse (390135751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157531093 - 2¹ = 157531091 is a prime.

Together with 157531091, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157531091) 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 as a sum of consecutive naturals, namely, 78765546 + 78765547.

It is an arithmetic number, because the mean of its divisors is an integer number (78765547).

Almost surely, 2^157531093 is an apocalyptic number.

It is an amenable number.

157531093 is a deficient number, since it is larger than the sum of its proper divisors (1).

157531093 is an equidigital number, since it uses as much as digits as its factorization.

157531093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14175, while the sum is 34.

The square root of 157531093 is about 12551.1391116504. The cubic root of 157531093 is about 540.0766843543.

The spelling of 157531093 in words is "one hundred fifty-seven million, five hundred thirty-one thousand, ninety-three".