38969621 has 4 divisors (see below), whose sum is σ = 40022892. Its totient is φ = 37916352.

The previous prime is 38969611. The next prime is 38969647. The reversal of 38969621 is 12696983.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32364721 + 6604900 = 5689^2 + 2570^2 .

It is a cyclic number.

It is not a de Polignac number, because 38969621 - 2¹⁰ = 38968597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38969611) 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, 526580 + ... + 526653.

It is an arithmetic number, because the mean of its divisors is an integer number (10005723).

Almost surely, 2^38969621 is an apocalyptic number.

It is an amenable number.

38969621 is a deficient number, since it is larger than the sum of its proper divisors (1053271).

38969621 is a wasteful number, since it uses less digits than its factorization.

38969621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053270.

The product of its digits is 139968, while the sum is 44.

The square root of 38969621 is about 6242.5652579689. The cubic root of 38969621 is about 339.0330687685.

The spelling of 38969621 in words is "thirty-eight million, nine hundred sixty-nine thousand, six hundred twenty-one".