157946849 has 2 divisors, whose sum is σ = 157946850. Its totient is φ = 157946848.

The previous prime is 157946843. The next prime is 157946851. The reversal of 157946849 is 948649751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147501025 + 10445824 = 12145^2 + 3232^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157946849 is a prime.

Together with 157946851, it forms a pair of twin primes.

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 157946849.

It is not a weakly prime, because it can be changed into another prime (157946843) 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, 78973424 + 78973425.

It is an arithmetic number, because the mean of its divisors is an integer number (78973425).

Almost surely, 2^157946849 is an apocalyptic number.

It is an amenable number.

157946849 is a deficient number, since it is larger than the sum of its proper divisors (1).

157946849 is an equidigital number, since it uses as much as digits as its factorization.

157946849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The square root of 157946849 is about 12567.6906788797. The cubic root of 157946849 is about 540.5513903767.

The spelling of 157946849 in words is "one hundred fifty-seven million, nine hundred forty-six thousand, eight hundred forty-nine".