137509642943 has 2 divisors, whose sum is σ = 137509642944. Its totient is φ = 137509642942.

The previous prime is 137509642909. The next prime is 137509642979. The reversal of 137509642943 is 349246905731.

It is a weak prime.

It is an emirp because it is prime and its reverse (349246905731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137509642943 is a prime.

It is a super-2 number, since 2×137509642943² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137509642043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68754821471 + 68754821472.

It is an arithmetic number, because the mean of its divisors is an integer number (68754821472).

Almost surely, 2^137509642943 is an apocalyptic number.

137509642943 is a deficient number, since it is larger than the sum of its proper divisors (1).

137509642943 is an equidigital number, since it uses as much as digits as its factorization.

137509642943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The spelling of 137509642943 in words is "one hundred thirty-seven billion, five hundred nine million, six hundred forty-two thousand, nine hundred forty-three".