137561081 has 6 divisors (see below), whose sum is σ = 160020090. Its totient is φ = 117909456.

The previous prime is 137561071. The next prime is 137561101. The reversal of 137561081 is 180165731.

It can be written as a sum of positive squares in only one way, i.e., 94264681 + 43296400 = 9709^2 + 6580^2 .

It is a de Polignac number, because none of the positive numbers 2^k-137561081 is a prime.

It is a super-2 number, since 2×137561081² = 37846102011777122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137561051) 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 5 ways as a sum of consecutive naturals, for example, 1403636 + ... + 1403733.

It is an arithmetic number, because the mean of its divisors is an integer number (26670015).

Almost surely, 2^137561081 is an apocalyptic number.

It is an amenable number.

137561081 is a deficient number, since it is larger than the sum of its proper divisors (22459009).

137561081 is an equidigital number, since it uses as much as digits as its factorization.

137561081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807383 (or 2807376 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 137561081 is about 11728.6436129674. The cubic root of 137561081 is about 516.2164739312.

The spelling of 137561081 in words is "one hundred thirty-seven million, five hundred sixty-one thousand, eighty-one".