137443643 has 2 divisors, whose sum is σ = 137443644. Its totient is φ = 137443642.

The previous prime is 137443639. The next prime is 137443661. The reversal of 137443643 is 346344731.

It is a weak prime.

It is an emirp because it is prime and its reverse (346344731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137443643 - 2² = 137443639 is a prime.

It is a super-2 number, since 2×137443643² = 37781510002222898, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137443633) 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, 68721821 + 68721822.

It is an arithmetic number, because the mean of its divisors is an integer number (68721822).

Almost surely, 2^137443643 is an apocalyptic number.

137443643 is a deficient number, since it is larger than the sum of its proper divisors (1).

137443643 is an equidigital number, since it uses as much as digits as its factorization.

137443643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 35.

The square root of 137443643 is about 11723.6360827177. The cubic root of 137443643 is about 516.0695314730.

The spelling of 137443643 in words is "one hundred thirty-seven million, four hundred forty-three thousand, six hundred forty-three".