157758427 has 2 divisors, whose sum is σ = 157758428. Its totient is φ = 157758426.

The previous prime is 157758421. The next prime is 157758431. The reversal of 157758427 is 724857751.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157758427 is a prime.

It is not a weakly prime, because it can be changed into another prime (157758421) 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, 78879213 + 78879214.

It is an arithmetic number, because the mean of its divisors is an integer number (78879214).

Almost surely, 2^157758427 is an apocalyptic number.

157758427 is a deficient number, since it is larger than the sum of its proper divisors (1).

157758427 is an equidigital number, since it uses as much as digits as its factorization.

157758427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 548800, while the sum is 46.

The square root of 157758427 is about 12560.1921561734. The cubic root of 157758427 is about 540.3363553765.

The spelling of 157758427 in words is "one hundred fifty-seven million, seven hundred fifty-eight thousand, four hundred twenty-seven".