137320427 has 4 divisors (see below), whose sum is σ = 137406456. Its totient is φ = 137234400.

The previous prime is 137320397. The next prime is 137320459. The reversal of 137320427 is 724023731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137320427 - 2⁶ = 137320363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137320427.

It is not an unprimeable number, because it can be changed into a prime (137320487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40574 + ... + 43827.

It is an arithmetic number, because the mean of its divisors is an integer number (34351614).

Almost surely, 2^137320427 is an apocalyptic number.

137320427 is a deficient number, since it is larger than the sum of its proper divisors (86029).

137320427 is an equidigital number, since it uses as much as digits as its factorization.

137320427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86028.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 137320427 is about 11718.3798794885. The cubic root of 137320427 is about 515.9152693737.

The spelling of 137320427 in words is "one hundred thirty-seven million, three hundred twenty thousand, four hundred twenty-seven".