137786729 has 2 divisors, whose sum is σ = 137786730. Its totient is φ = 137786728.

The previous prime is 137786641. The next prime is 137786741. The reversal of 137786729 is 927687731.

137786729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74425129 + 63361600 = 8627^2 + 7960^2 .

It is a cyclic number.

It is not a de Polignac number, because 137786729 - 2¹⁶ = 137721193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (137786029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68893364 + 68893365.

It is an arithmetic number, because the mean of its divisors is an integer number (68893365).

Almost surely, 2^137786729 is an apocalyptic number.

It is an amenable number.

137786729 is a deficient number, since it is larger than the sum of its proper divisors (1).

137786729 is an equidigital number, since it uses as much as digits as its factorization.

137786729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 50.

The square root of 137786729 is about 11738.2591980242. The cubic root of 137786729 is about 516.4985779029.

The spelling of 137786729 in words is "one hundred thirty-seven million, seven hundred eighty-six thousand, seven hundred twenty-nine".