137215489 has 2 divisors, whose sum is σ = 137215490. Its totient is φ = 137215488.

The previous prime is 137215487. The next prime is 137215541. The reversal of 137215489 is 984512731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94090000 + 43125489 = 9700^2 + 6567^2 .

It is an emirp because it is prime and its reverse (984512731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137215489 - 2¹ = 137215487 is a prime.

Together with 137215487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (137215487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68607744 + 68607745.

It is an arithmetic number, because the mean of its divisors is an integer number (68607745).

Almost surely, 2^137215489 is an apocalyptic number.

It is an amenable number.

137215489 is a deficient number, since it is larger than the sum of its proper divisors (1).

137215489 is an equidigital number, since it uses as much as digits as its factorization.

137215489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 137215489 is about 11713.9015276722. The cubic root of 137215489 is about 515.7838179106.

It can be divided in two parts, 1372 and 15489, that added together give a palindrome (16861).

The spelling of 137215489 in words is "one hundred thirty-seven million, two hundred fifteen thousand, four hundred eighty-nine".