137870869 has 2 divisors, whose sum is σ = 137870870. Its totient is φ = 137870868.

The previous prime is 137870849. The next prime is 137870899. The reversal of 137870869 is 968078731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90440100 + 47430769 = 9510^2 + 6887^2 .

It is a cyclic number.

It is not a de Polignac number, because 137870869 - 2¹¹ = 137868821 is a prime.

It is a super-2 number, since 2×137870869² = 38016753037630322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137870849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68935434 + 68935435.

It is an arithmetic number, because the mean of its divisors is an integer number (68935435).

Almost surely, 2^137870869 is an apocalyptic number.

It is an amenable number.

137870869 is a deficient number, since it is larger than the sum of its proper divisors (1).

137870869 is an equidigital number, since it uses as much as digits as its factorization.

137870869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 137870869 is about 11741.8426577774. The cubic root of 137870869 is about 516.6036904627.

The spelling of 137870869 in words is "one hundred thirty-seven million, eight hundred seventy thousand, eight hundred sixty-nine".