137738989 has 4 divisors (see below), whose sum is σ = 137896924. Its totient is φ = 137581056.

The previous prime is 137738987. The next prime is 137739001. The reversal of 137738989 is 989837731.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82355625 + 55383364 = 9075^2 + 7442^2 .

It is a cyclic number.

It is not a de Polignac number, because 137738989 - 2¹ = 137738987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137738987) 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, 77652 + ... + 79405.

It is an arithmetic number, because the mean of its divisors is an integer number (34474231).

Almost surely, 2^137738989 is an apocalyptic number.

It is an amenable number.

137738989 is a deficient number, since it is larger than the sum of its proper divisors (157935).

137738989 is an equidigital number, since it uses as much as digits as its factorization.

137738989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157934.

The product of its digits is 2286144, while the sum is 55.

The square root of 137738989 is about 11736.2255005602. The cubic root of 137738989 is about 516.4389193020.

The spelling of 137738989 in words is "one hundred thirty-seven million, seven hundred thirty-eight thousand, nine hundred eighty-nine".