157680337 has 4 divisors (see below), whose sum is σ = 163117620. Its totient is φ = 152243056.

The previous prime is 157680317. The next prime is 157680343. The reversal of 157680337 is 733086751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62110161 + 95570176 = 7881^2 + 9776^2 .

It is a cyclic number.

It is not a de Polignac number, because 157680337 - 2¹¹ = 157678289 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157680337.

It is not an unprimeable number, because it can be changed into a prime (157680317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2718598 + ... + 2718655.

It is an arithmetic number, because the mean of its divisors is an integer number (40779405).

Almost surely, 2^157680337 is an apocalyptic number.

It is an amenable number.

157680337 is a deficient number, since it is larger than the sum of its proper divisors (5437283).

157680337 is an equidigital number, since it uses as much as digits as its factorization.

157680337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5437282.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 157680337 is about 12557.0831406024. The cubic root of 157680337 is about 540.2471856444.

The spelling of 157680337 in words is "one hundred fifty-seven million, six hundred eighty thousand, three hundred thirty-seven".