137378689 has 4 divisors (see below), whose sum is σ = 157004224. Its totient is φ = 117753156.

The previous prime is 137378687. The next prime is 137378693. The reversal of 137378689 is 986873731.

It is a happy number.

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 137378689 - 2¹ = 137378687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137378687) 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, 9812757 + ... + 9812770.

It is an arithmetic number, because the mean of its divisors is an integer number (39251056).

Almost surely, 2^137378689 is an apocalyptic number.

It is an amenable number.

137378689 is a deficient number, since it is larger than the sum of its proper divisors (19625535).

137378689 is an equidigital number, since it uses as much as digits as its factorization.

137378689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19625534.

The product of its digits is 1524096, while the sum is 52.

The square root of 137378689 is about 11720.8655397116. The cubic root of 137378689 is about 515.9882228448.

The spelling of 137378689 in words is "one hundred thirty-seven million, three hundred seventy-eight thousand, six hundred eighty-nine".