38621137 has 4 divisors (see below), whose sum is σ = 38764980. Its totient is φ = 38477296.

The previous prime is 38621131. The next prime is 38621159. The reversal of 38621137 is 73112683.

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 20439441 + 18181696 = 4521^2 + 4264^2 .

It is a cyclic number.

It is not a de Polignac number, because 38621137 - 2¹⁵ = 38588369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38621099 and 38621108.

It is not an unprimeable number, because it can be changed into a prime (38621131) 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, 71518 + ... + 72055.

It is an arithmetic number, because the mean of its divisors is an integer number (9691245).

Almost surely, 2^38621137 is an apocalyptic number.

It is an amenable number.

38621137 is a deficient number, since it is larger than the sum of its proper divisors (143843).

38621137 is a wasteful number, since it uses less digits than its factorization.

38621137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143842.

The product of its digits is 6048, while the sum is 31.

The square root of 38621137 is about 6214.5906542587. The cubic root of 38621137 is about 338.0194455626.

The spelling of 38621137 in words is "thirty-eight million, six hundred twenty-one thousand, one hundred thirty-seven".