137243893 has 2 divisors, whose sum is σ = 137243894. Its totient is φ = 137243892.

The previous prime is 137243857. The next prime is 137243987. The reversal of 137243893 is 398342731.

137243893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136843204 + 400689 = 11698^2 + 633^2 .

It is a cyclic number.

It is not a de Polignac number, because 137243893 - 2²⁵ = 103689461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137243833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68621946 + 68621947.

It is an arithmetic number, because the mean of its divisors is an integer number (68621947).

Almost surely, 2^137243893 is an apocalyptic number.

It is an amenable number.

137243893 is a deficient number, since it is larger than the sum of its proper divisors (1).

137243893 is an equidigital number, since it uses as much as digits as its factorization.

137243893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 137243893 is about 11715.1138705520. The cubic root of 137243893 is about 515.8194050320.

The spelling of 137243893 in words is "one hundred thirty-seven million, two hundred forty-three thousand, eight hundred ninety-three".