137137561 has 8 divisors (see below), whose sum is σ = 150502464. Its totient is φ = 123922320.

The previous prime is 137137537. The next prime is 137137571. The reversal of 137137561 is 165731731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 137137561 - 2⁵ = 137137529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137137571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35490 + ... + 39163.

It is an arithmetic number, because the mean of its divisors is an integer number (18812808).

Almost surely, 2^137137561 is an apocalyptic number.

137137561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

137137561 is a deficient number, since it is larger than the sum of its proper divisors (13364903).

137137561 is a wasteful number, since it uses less digits than its factorization.

137137561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74831.

The product of its digits is 13230, while the sum is 34.

The square root of 137137561 is about 11710.5747510530. The cubic root of 137137561 is about 515.6861573789.

The spelling of 137137561 in words is "one hundred thirty-seven million, one hundred thirty-seven thousand, five hundred sixty-one".