156847381 has 2 divisors, whose sum is σ = 156847382. Its totient is φ = 156847380.

The previous prime is 156847363. The next prime is 156847393. The reversal of 156847381 is 183748651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151044100 + 5803281 = 12290^2 + 2409^2 .

It is a cyclic number.

It is not a de Polignac number, because 156847381 - 2¹⁹ = 156323093 is a prime.

It is a super-2 number, since 2×156847381² = 49202201853118322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156847331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78423690 + 78423691.

It is an arithmetic number, because the mean of its divisors is an integer number (78423691).

Almost surely, 2^156847381 is an apocalyptic number.

It is an amenable number.

156847381 is a deficient number, since it is larger than the sum of its proper divisors (1).

156847381 is an equidigital number, since it uses as much as digits as its factorization.

156847381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 156847381 is about 12523.8724442562. The cubic root of 156847381 is about 539.2942093783.

The spelling of 156847381 in words is "one hundred fifty-six million, eight hundred forty-seven thousand, three hundred eighty-one".