137028709 has 2 divisors, whose sum is σ = 137028710. Its totient is φ = 137028708.

The previous prime is 137028707. The next prime is 137028713. The reversal of 137028709 is 907820731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136072225 + 956484 = 11665^2 + 978^2 .

It is a cyclic number.

It is not a de Polignac number, because 137028709 - 2¹ = 137028707 is a prime.

Together with 137028707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137028701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68514354 + 68514355.

It is an arithmetic number, because the mean of its divisors is an integer number (68514355).

Almost surely, 2^137028709 is an apocalyptic number.

It is an amenable number.

137028709 is a deficient number, since it is larger than the sum of its proper divisors (1).

137028709 is an equidigital number, since it uses as much as digits as its factorization.

137028709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 137028709 is about 11705.9262341773. The cubic root of 137028709 is about 515.5496804779.

The spelling of 137028709 in words is "one hundred thirty-seven million, twenty-eight thousand, seven hundred nine".