137705569 has 4 divisors (see below), whose sum is σ = 139760944. Its totient is φ = 135650196.

The previous prime is 137705567. The next prime is 137705591. The reversal of 137705569 is 965507731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137705569 - 2¹ = 137705567 is a prime.

It is a super-2 number, since 2×137705569² = 37925647467227522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137705567) 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 in 3 ways as a sum of consecutive naturals, for example, 1027587 + ... + 1027720.

It is an arithmetic number, because the mean of its divisors is an integer number (34940236).

Almost surely, 2^137705569 is an apocalyptic number.

It is an amenable number.

137705569 is a deficient number, since it is larger than the sum of its proper divisors (2055375).

137705569 is an equidigital number, since it uses as much as digits as its factorization.

137705569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055374.

The product of its (nonzero) digits is 198450, while the sum is 43.

The square root of 137705569 is about 11734.8016174113. The cubic root of 137705569 is about 516.3971475788.

The spelling of 137705569 in words is "one hundred thirty-seven million, seven hundred five thousand, five hundred sixty-nine".