137793545 has 4 divisors (see below), whose sum is σ = 165352260. Its totient is φ = 110234832.

The previous prime is 137793541. The next prime is 137793547. The reversal of 137793545 is 545397731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545397731 = 83 ⋅6571057.

It can be written as a sum of positive squares in 2 ways, for example, as 56505289 + 81288256 = 7517^2 + 9016^2 .

It is a cyclic number.

It is not a de Polignac number, because 137793545 - 2² = 137793541 is a prime.

It is a super-2 number, since 2×137793545² = 37974122087334050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 137793496 and 137793505.

It is not an unprimeable number, because it can be changed into a prime (137793541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13779350 + ... + 13779359.

It is an arithmetic number, because the mean of its divisors is an integer number (41338065).

Almost surely, 2^137793545 is an apocalyptic number.

It is an amenable number.

137793545 is a deficient number, since it is larger than the sum of its proper divisors (27558715).

137793545 is an equidigital number, since it uses as much as digits as its factorization.

137793545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27558714.

The product of its digits is 396900, while the sum is 44.

The square root of 137793545 is about 11738.5495270923. The cubic root of 137793545 is about 516.5070944373.

The spelling of 137793545 in words is "one hundred thirty-seven million, seven hundred ninety-three thousand, five hundred forty-five".