137816493 has 4 divisors (see below), whose sum is σ = 183755328. Its totient is φ = 91877660.

The previous prime is 137816491. The next prime is 137816513. The reversal of 137816493 is 394618731.

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.

It is a cyclic number.

It is not a de Polignac number, because 137816493 - 2¹ = 137816491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137816491) 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, 22969413 + ... + 22969418.

It is an arithmetic number, because the mean of its divisors is an integer number (45938832).

Almost surely, 2^137816493 is an apocalyptic number.

It is an amenable number.

137816493 is a deficient number, since it is larger than the sum of its proper divisors (45938835).

137816493 is an equidigital number, since it uses as much as digits as its factorization.

137816493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45938834.

The product of its digits is 108864, while the sum is 42.

The square root of 137816493 is about 11739.5269495836. The cubic root of 137816493 is about 516.5357657051.

It can be divided in two parts, 1378 and 16493, that added together give a palindrome (17871).

The spelling of 137816493 in words is "one hundred thirty-seven million, eight hundred sixteen thousand, four hundred ninety-three".