157242893 has 2 divisors, whose sum is σ = 157242894. Its totient is φ = 157242892.

The previous prime is 157242889. The next prime is 157242929. The reversal of 157242893 is 398242751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111788329 + 45454564 = 10573^2 + 6742^2 .

It is a cyclic number.

It is not a de Polignac number, because 157242893 - 2² = 157242889 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157242893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157242853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78621446 + 78621447.

It is an arithmetic number, because the mean of its divisors is an integer number (78621447).

Almost surely, 2^157242893 is an apocalyptic number.

It is an amenable number.

157242893 is a deficient number, since it is larger than the sum of its proper divisors (1).

157242893 is an equidigital number, since it uses as much as digits as its factorization.

157242893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 157242893 is about 12539.6528261352. The cubic root of 157242893 is about 539.7471301191.

The spelling of 157242893 in words is "one hundred fifty-seven million, two hundred forty-two thousand, eight hundred ninety-three".