137727321 has 4 divisors (see below), whose sum is σ = 183636432. Its totient is φ = 91818212.

The previous prime is 137727311. The next prime is 137727367. The reversal of 137727321 is 123727731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123727731 = 3 ⋅41242577.

It is a cyclic number.

It is not a de Polignac number, because 137727321 - 2¹⁵ = 137694553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (137727301) 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 3 ways as a sum of consecutive naturals, for example, 22954551 + ... + 22954556.

It is an arithmetic number, because the mean of its divisors is an integer number (45909108).

Almost surely, 2^137727321 is an apocalyptic number.

It is an amenable number.

137727321 is a deficient number, since it is larger than the sum of its proper divisors (45909111).

137727321 is an equidigital number, since it uses as much as digits as its factorization.

137727321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45909110.

The product of its digits is 12348, while the sum is 33.

The square root of 137727321 is about 11735.7283966527. The cubic root of 137727321 is about 516.4243362138.

The spelling of 137727321 in words is "one hundred thirty-seven million, seven hundred twenty-seven thousand, three hundred twenty-one".