157816349 has 2 divisors, whose sum is σ = 157816350. Its totient is φ = 157816348.

The previous prime is 157816343. The next prime is 157816367. The reversal of 157816349 is 943618751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99400900 + 58415449 = 9970^2 + 7643^2 .

It is an emirp because it is prime and its reverse (943618751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157816349 - 2¹² = 157812253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157816343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78908174 + 78908175.

It is an arithmetic number, because the mean of its divisors is an integer number (78908175).

Almost surely, 2^157816349 is an apocalyptic number.

It is an amenable number.

157816349 is a deficient number, since it is larger than the sum of its proper divisors (1).

157816349 is an equidigital number, since it uses as much as digits as its factorization.

157816349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 157816349 is about 12562.4977213928. The cubic root of 157816349 is about 540.4024765835.

The spelling of 157816349 in words is "one hundred fifty-seven million, eight hundred sixteen thousand, three hundred forty-nine".