137808029 has 4 divisors (see below), whose sum is σ = 142560060. Its totient is φ = 133056000.

The previous prime is 137807987. The next prime is 137808031. The reversal of 137808029 is 920808731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 920808731 = 8887 ⋅103613.

It can be written as a sum of positive squares in 2 ways, for example, as 81902500 + 55905529 = 9050^2 + 7477^2 .

It is a cyclic number.

It is not a de Polignac number, because 137808029 - 2¹² = 137803933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137807983 and 137808001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137808059) 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 in 3 ways as a sum of consecutive naturals, for example, 2375972 + ... + 2376029.

It is an arithmetic number, because the mean of its divisors is an integer number (35640015).

Almost surely, 2^137808029 is an apocalyptic number.

It is an amenable number.

137808029 is a deficient number, since it is larger than the sum of its proper divisors (4752031).

137808029 is an equidigital number, since it uses as much as digits as its factorization.

137808029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4752030.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 137808029 is about 11739.1664525212. The cubic root of 137808029 is about 516.5251911405.

The spelling of 137808029 in words is "one hundred thirty-seven million, eight hundred eight thousand, twenty-nine".