137823449 has 2 divisors, whose sum is σ = 137823450. Its totient is φ = 137823448.

The previous prime is 137823443. The next prime is 137823451. The reversal of 137823449 is 944328731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136305625 + 1517824 = 11675^2 + 1232^2 .

It is an emirp because it is prime and its reverse (944328731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137823449 - 2¹⁶ = 137757913 is a prime.

Together with 137823451, 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 (137823443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68911724 + 68911725.

It is an arithmetic number, because the mean of its divisors is an integer number (68911725).

Almost surely, 2^137823449 is an apocalyptic number.

It is an amenable number.

137823449 is a deficient number, since it is larger than the sum of its proper divisors (1).

137823449 is an equidigital number, since it uses as much as digits as its factorization.

137823449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 137823449 is about 11739.8232099125. The cubic root of 137823449 is about 516.5444559140.

The spelling of 137823449 in words is "one hundred thirty-seven million, eight hundred twenty-three thousand, four hundred forty-nine".