137689423 has 2 divisors, whose sum is σ = 137689424. Its totient is φ = 137689422.

The previous prime is 137689403. The next prime is 137689427. The reversal of 137689423 is 324986731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137689423 - 2⁹ = 137688911 is a prime.

It is equal to p_7789057 and since 137689423 and 7789057 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137689423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137689427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68844711 + 68844712.

It is an arithmetic number, because the mean of its divisors is an integer number (68844712).

Almost surely, 2^137689423 is an apocalyptic number.

137689423 is a deficient number, since it is larger than the sum of its proper divisors (1).

137689423 is an equidigital number, since it uses as much as digits as its factorization.

137689423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The square root of 137689423 is about 11734.1136435608. The cubic root of 137689423 is about 516.3769642405.

The spelling of 137689423 in words is "one hundred thirty-seven million, six hundred eighty-nine thousand, four hundred twenty-three".