137478727 has 2 divisors, whose sum is σ = 137478728. Its totient is φ = 137478726.

The previous prime is 137478721. The next prime is 137478739. The reversal of 137478727 is 727874731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137478727 - 2⁷ = 137478599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137478721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68739363 + 68739364.

It is an arithmetic number, because the mean of its divisors is an integer number (68739364).

Almost surely, 2^137478727 is an apocalyptic number.

137478727 is a deficient number, since it is larger than the sum of its proper divisors (1).

137478727 is an equidigital number, since it uses as much as digits as its factorization.

137478727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460992, while the sum is 46.

The square root of 137478727 is about 11725.1322807037. The cubic root of 137478727 is about 516.1134385434.

It can be divided in two parts, 137 and 478727, that added together give a square (478864 = 692²).

The spelling of 137478727 in words is "one hundred thirty-seven million, four hundred seventy-eight thousand, seven hundred twenty-seven".