137444369 has 8 divisors (see below), whose sum is σ = 142407720. Its totient is φ = 132496000.

The previous prime is 137444323. The next prime is 137444399. The reversal of 137444369 is 963444731.

It can be written as a sum of positive squares in 4 ways, for example, as 66210769 + 71233600 = 8137^2 + 8440^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 137444369 - 2¹² = 137440273 is a prime.

It is a super-2 number, since 2×137444369² = 37781909139616322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137444399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16949 + ... + 23709.

It is an arithmetic number, because the mean of its divisors is an integer number (17800965).

Almost surely, 2^137444369 is an apocalyptic number.

It is an amenable number.

137444369 is a deficient number, since it is larger than the sum of its proper divisors (4963351).

137444369 is an equidigital number, since it uses as much as digits as its factorization.

137444369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7491.

The product of its digits is 217728, while the sum is 41.

The square root of 137444369 is about 11723.6670457669. The cubic root of 137444369 is about 516.0704401263.

The spelling of 137444369 in words is "one hundred thirty-seven million, four hundred forty-four thousand, three hundred sixty-nine".