137644343 has 4 divisors (see below), whose sum is σ = 138245640. Its totient is φ = 137043048.

The previous prime is 137644337. The next prime is 137644349. The reversal of 137644343 is 343446731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 343446731 = 53 ⋅6480127.

It is an interprime number because it is at equal distance from previous prime (137644337) and next prime (137644349).

It is a cyclic number.

It is not a de Polignac number, because 137644343 - 2⁴ = 137644327 is a prime.

It is a super-4 number, since 4×137644343⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137644349) 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, 300305 + ... + 300762.

It is an arithmetic number, because the mean of its divisors is an integer number (34561410).

Almost surely, 2^137644343 is an apocalyptic number.

137644343 is a deficient number, since it is larger than the sum of its proper divisors (601297).

137644343 is an equidigital number, since it uses as much as digits as its factorization.

137644343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601296.

The product of its digits is 72576, while the sum is 35.

The square root of 137644343 is about 11732.1925913275. The cubic root of 137644343 is about 516.3206035461.

The spelling of 137644343 in words is "one hundred thirty-seven million, six hundred forty-four thousand, three hundred forty-three".