156820841 has 2 divisors, whose sum is σ = 156820842. Its totient is φ = 156820840.

The previous prime is 156820793. The next prime is 156820843. The reversal of 156820841 is 148028651.

156820841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96432400 + 60388441 = 9820^2 + 7771^2 .

It is an emirp because it is prime and its reverse (148028651) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156820841 is a prime.

Together with 156820843, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156820843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78410420 + 78410421.

It is an arithmetic number, because the mean of its divisors is an integer number (78410421).

Almost surely, 2^156820841 is an apocalyptic number.

It is an amenable number.

156820841 is a deficient number, since it is larger than the sum of its proper divisors (1).

156820841 is an equidigital number, since it uses as much as digits as its factorization.

156820841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 156820841 is about 12522.8128230043. The cubic root of 156820841 is about 539.2637898380.

The spelling of 156820841 in words is "one hundred fifty-six million, eight hundred twenty thousand, eight hundred forty-one".