137778389 has 8 divisors (see below), whose sum is σ = 157539648. Its totient is φ = 118036800.

The previous prime is 137778379. The next prime is 137778413. The reversal of 137778389 is 983877731.

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

It is not a de Polignac number, because 137778389 - 2⁴ = 137778373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137778389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137778359) 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 7 ways as a sum of consecutive naturals, for example, 16094 + ... + 23120.

It is an arithmetic number, because the mean of its divisors is an integer number (19692456).

Almost surely, 2^137778389 is an apocalyptic number.

It is an amenable number.

137778389 is a deficient number, since it is larger than the sum of its proper divisors (19761259).

137778389 is an equidigital number, since it uses as much as digits as its factorization.

137778389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9835.

The product of its digits is 1778112, while the sum is 53.

The square root of 137778389 is about 11737.9039440609. The cubic root of 137778389 is about 516.4881567613.

The spelling of 137778389 in words is "one hundred thirty-seven million, seven hundred seventy-eight thousand, three hundred eighty-nine".