38164981 has 4 divisors (see below), whose sum is σ = 39824352. Its totient is φ = 36505612.

The previous prime is 38164967. The next prime is 38164993. The reversal of 38164981 is 18946183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18946183 = 37 ⋅512059.

It is a cyclic number.

It is not a de Polignac number, because 38164981 - 2⁷ = 38164853 is a prime.

It is a super-2 number, since 2×38164981² = 2913131549460722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38164961) 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, 829651 + ... + 829696.

It is an arithmetic number, because the mean of its divisors is an integer number (9956088).

Almost surely, 2^38164981 is an apocalyptic number.

It is an amenable number.

38164981 is a deficient number, since it is larger than the sum of its proper divisors (1659371).

38164981 is a wasteful number, since it uses less digits than its factorization.

38164981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659370.

The product of its digits is 41472, while the sum is 40.

The square root of 38164981 is about 6177.7812360102. The cubic root of 38164981 is about 336.6833839143.

The spelling of 38164981 in words is "thirty-eight million, one hundred sixty-four thousand, nine hundred eighty-one".