137748427 has 2 divisors, whose sum is σ = 137748428. Its totient is φ = 137748426.

The previous prime is 137748419. The next prime is 137748473. The reversal of 137748427 is 724847731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137748427 - 2³ = 137748419 is a prime.

It is not a weakly prime, because it can be changed into another prime (137743427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68874213 + 68874214.

It is an arithmetic number, because the mean of its divisors is an integer number (68874214).

Almost surely, 2^137748427 is an apocalyptic number.

137748427 is a deficient number, since it is larger than the sum of its proper divisors (1).

137748427 is an equidigital number, since it uses as much as digits as its factorization.

137748427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 263424, while the sum is 43.

The square root of 137748427 is about 11736.6275820612. The cubic root of 137748427 is about 516.4507146531.

It can be divided in two parts, 13774 and 8427, that added together give a square (22201 = 149²).

The spelling of 137748427 in words is "one hundred thirty-seven million, seven hundred forty-eight thousand, four hundred twenty-seven".