138343623 has 8 divisors (see below), whose sum is σ = 201227136. Its totient is φ = 83844600.

The previous prime is 138343619. The next prime is 138343649. The reversal of 138343623 is 326343831.

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

It is not a de Polignac number, because 138343623 - 2² = 138343619 is a prime.

It is a super-2 number, since 2×138343623² = 38277916049532258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 4192231 = 138343623 / (1 + 3 + 8 + 3 + 4 + 3 + 6 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138343423) 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, 2096083 + ... + 2096148.

It is an arithmetic number, because the mean of its divisors is an integer number (25153392).

Almost surely, 2^138343623 is an apocalyptic number.

138343623 is a deficient number, since it is larger than the sum of its proper divisors (62883513).

138343623 is a wasteful number, since it uses less digits than its factorization.

138343623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192245.

The product of its digits is 31104, while the sum is 33.

The square root of 138343623 is about 11761.9565974373. The cubic root of 138343623 is about 517.1934883551.

The spelling of 138343623 in words is "one hundred thirty-eight million, three hundred forty-three thousand, six hundred twenty-three".