156870449 has 2 divisors, whose sum is σ = 156870450. Its totient is φ = 156870448.

The previous prime is 156870433. The next prime is 156870451. The reversal of 156870449 is 944078651.

156870449 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., 94965025 + 61905424 = 9745^2 + 7868^2 .

It is a cyclic number.

It is not a de Polignac number, because 156870449 - 2⁴ = 156870433 is a prime.

Together with 156870451, 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 (156872449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78435224 + 78435225.

It is an arithmetic number, because the mean of its divisors is an integer number (78435225).

Almost surely, 2^156870449 is an apocalyptic number.

It is an amenable number.

156870449 is a deficient number, since it is larger than the sum of its proper divisors (1).

156870449 is an equidigital number, since it uses as much as digits as its factorization.

156870449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 156870449 is about 12524.7933715491. The cubic root of 156870449 is about 539.3206466043.

The spelling of 156870449 in words is "one hundred fifty-six million, eight hundred seventy thousand, four hundred forty-nine".