137443261 has 2 divisors, whose sum is σ = 137443262. Its totient is φ = 137443260.

The previous prime is 137443253. The next prime is 137443289. The reversal of 137443261 is 162344731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123343236 + 14100025 = 11106^2 + 3755^2 .

It is a cyclic number.

It is not a de Polignac number, because 137443261 - 2³ = 137443253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137443231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68721630 + 68721631.

It is an arithmetic number, because the mean of its divisors is an integer number (68721631).

Almost surely, 2^137443261 is an apocalyptic number.

It is an amenable number.

137443261 is a deficient number, since it is larger than the sum of its proper divisors (1).

137443261 is an equidigital number, since it uses as much as digits as its factorization.

137443261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 137443261 is about 11723.6197908325. The cubic root of 137443261 is about 516.0690533650.

Adding to 137443261 its reverse (162344731), we get a palindrome (299787992).

The spelling of 137443261 in words is "one hundred thirty-seven million, four hundred forty-three thousand, two hundred sixty-one".