38121623 has 4 divisors (see below), whose sum is σ = 38137680. Its totient is φ = 38105568.

The previous prime is 38121617. The next prime is 38121659. The reversal of 38121623 is 32612183.

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

It is a cyclic number.

It is not a de Polignac number, because 38121623 - 2²² = 33927319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38121592 and 38121601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38121613) 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, 3683 + ... + 9476.

It is an arithmetic number, because the mean of its divisors is an integer number (9534420).

Almost surely, 2^38121623 is an apocalyptic number.

38121623 is a deficient number, since it is larger than the sum of its proper divisors (16057).

38121623 is a wasteful number, since it uses less digits than its factorization.

38121623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16056.

The product of its digits is 1728, while the sum is 26.

The square root of 38121623 is about 6174.2710500917. The cubic root of 38121623 is about 336.5558372354. Note that the first 3 decimals are identical.

The spelling of 38121623 in words is "thirty-eight million, one hundred twenty-one thousand, six hundred twenty-three".