38197139 has 4 divisors (see below), whose sum is σ = 38346024. Its totient is φ = 38048256.

The previous prime is 38197129. The next prime is 38197141. The reversal of 38197139 is 93179183.

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 38197139 - 2⁴ = 38197123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38197096 and 38197105.

It is not an unprimeable number, because it can be changed into a prime (38197129) 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, 74057 + ... + 74570.

It is an arithmetic number, because the mean of its divisors is an integer number (9586506).

Almost surely, 2^38197139 is an apocalyptic number.

38197139 is a deficient number, since it is larger than the sum of its proper divisors (148885).

38197139 is a wasteful number, since it uses less digits than its factorization.

38197139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148884.

The product of its digits is 40824, while the sum is 41.

The square root of 38197139 is about 6180.3834023465. The cubic root of 38197139 is about 336.7779210565. Note that the first 3 decimals are identical.

The spelling of 38197139 in words is "thirty-eight million, one hundred ninety-seven thousand, one hundred thirty-nine".