159777947 has 8 divisors (see below), whose sum is σ = 185105376. Its totient is φ = 135076032.

The previous prime is 159777901. The next prime is 159777983. The reversal of 159777947 is 749777951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 159777947 - 2¹² = 159773851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 159777892 and 159777901.

It is not an unprimeable number, because it can be changed into a prime (159774947) 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 7 ways as a sum of consecutive naturals, for example, 155828 + ... + 156849.

It is an arithmetic number, because the mean of its divisors is an integer number (23138172).

Almost surely, 2^159777947 is an apocalyptic number.

159777947 is a deficient number, since it is larger than the sum of its proper divisors (25327429).

159777947 is an equidigital number, since it uses as much as digits as its factorization.

159777947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312757.

The product of its digits is 3889620, while the sum is 56.

The square root of 159777947 is about 12640.3301776496. The cubic root of 159777947 is about 542.6322634748.

The spelling of 159777947 in words is "one hundred fifty-nine million, seven hundred seventy-seven thousand, nine hundred forty-seven".