156916489 has 2 divisors, whose sum is σ = 156916490. Its totient is φ = 156916488.

The previous prime is 156916457. The next prime is 156916537. The reversal of 156916489 is 984619651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130988025 + 25928464 = 11445^2 + 5092^2 .

It is a cyclic number.

It is not a de Polignac number, because 156916489 - 2⁵ = 156916457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156913489) 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, 78458244 + 78458245.

It is an arithmetic number, because the mean of its divisors is an integer number (78458245).

Almost surely, 2^156916489 is an apocalyptic number.

It is an amenable number.

156916489 is a deficient number, since it is larger than the sum of its proper divisors (1).

156916489 is an equidigital number, since it uses as much as digits as its factorization.

156916489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 49.

The square root of 156916489 is about 12526.6311911862. The cubic root of 156916489 is about 539.3734032877.

The spelling of 156916489 in words is "one hundred fifty-six million, nine hundred sixteen thousand, four hundred eighty-nine".