137890943 has 2 divisors, whose sum is σ = 137890944. Its totient is φ = 137890942.

The previous prime is 137890939. The next prime is 137890979. The reversal of 137890943 is 349098731.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (349098731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137890943 - 2² = 137890939 is a prime.

It is a super-2 number, since 2×137890943² = 38027824322858498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 137890894 and 137890903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137890933) 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, 68945471 + 68945472.

It is an arithmetic number, because the mean of its divisors is an integer number (68945472).

Almost surely, 2^137890943 is an apocalyptic number.

137890943 is a deficient number, since it is larger than the sum of its proper divisors (1).

137890943 is an equidigital number, since it uses as much as digits as its factorization.

137890943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 137890943 is about 11742.6974328729. The cubic root of 137890943 is about 516.6287617469.

The spelling of 137890943 in words is "one hundred thirty-seven million, eight hundred ninety thousand, nine hundred forty-three".