157804123 has 2 divisors, whose sum is σ = 157804124. Its totient is φ = 157804122.

The previous prime is 157804111. The next prime is 157804151. The reversal of 157804123 is 321408751.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157804123 is a prime.

It is not a weakly prime, because it can be changed into another prime (157814123) 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, 78902061 + 78902062.

It is an arithmetic number, because the mean of its divisors is an integer number (78902062).

Almost surely, 2^157804123 is an apocalyptic number.

157804123 is a deficient number, since it is larger than the sum of its proper divisors (1).

157804123 is an equidigital number, since it uses as much as digits as its factorization.

157804123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 157804123 is about 12562.0111049147. The cubic root of 157804123 is about 540.3885212670.

The spelling of 157804123 in words is "one hundred fifty-seven million, eight hundred four thousand, one hundred twenty-three".