157843849 has 4 divisors (see below), whose sum is σ = 166151440. Its totient is φ = 149536260.

The previous prime is 157843823. The next prime is 157843853. The reversal of 157843849 is 948348751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157843849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157843859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4153767 + ... + 4153804.

It is an arithmetic number, because the mean of its divisors is an integer number (41537860).

Almost surely, 2^157843849 is an apocalyptic number.

157843849 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

157843849 is a deficient number, since it is larger than the sum of its proper divisors (8307591).

157843849 is an equidigital number, since it uses as much as digits as its factorization.

157843849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8307590.

The product of its digits is 967680, while the sum is 49.

The square root of 157843849 is about 12563.5922012775. The cubic root of 157843849 is about 540.4338637097.

The spelling of 157843849 in words is "one hundred fifty-seven million, eight hundred forty-three thousand, eight hundred forty-nine".