157857473 has 2 divisors, whose sum is σ = 157857474. Its totient is φ = 157857472.

The previous prime is 157857449. The next prime is 157857493. The reversal of 157857473 is 374758751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87011584 + 70845889 = 9328^2 + 8417^2 .

It is an emirp because it is prime and its reverse (374758751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157857473 - 2¹⁰ = 157856449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (157857433) 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 as a sum of consecutive naturals, namely, 78928736 + 78928737.

It is an arithmetic number, because the mean of its divisors is an integer number (78928737).

Almost surely, 2^157857473 is an apocalyptic number.

It is an amenable number.

157857473 is a deficient number, since it is larger than the sum of its proper divisors (1).

157857473 is an equidigital number, since it uses as much as digits as its factorization.

157857473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 823200, while the sum is 47.

The square root of 157857473 is about 12564.1343911946. The cubic root of 157857473 is about 540.4494121123.

The spelling of 157857473 in words is "one hundred fifty-seven million, eight hundred fifty-seven thousand, four hundred seventy-three".