39238981 has 4 divisors (see below), whose sum is σ = 40299532. Its totient is φ = 38178432.

The previous prime is 39238961. The next prime is 39239003. The reversal of 39238981 is 18983293.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18983293 = 7 ⋅2711899.

It can be written as a sum of positive squares in 2 ways, for example, as 16524225 + 22714756 = 4065^2 + 4766^2 .

It is a cyclic number.

It is not a de Polignac number, because 39238981 - 2⁵ = 39238949 is a prime.

It is a super-2 number, since 2×39238981² = 3079395259836722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39238961) 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, 530220 + ... + 530293.

It is an arithmetic number, because the mean of its divisors is an integer number (10074883).

Almost surely, 2^39238981 is an apocalyptic number.

It is an amenable number.

39238981 is a deficient number, since it is larger than the sum of its proper divisors (1060551).

39238981 is a wasteful number, since it uses less digits than its factorization.

39238981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060550.

The product of its digits is 93312, while the sum is 43.

The square root of 39238981 is about 6264.1025694029. The cubic root of 39238981 is about 339.8124138243.

The spelling of 39238981 in words is "thirty-nine million, two hundred thirty-eight thousand, nine hundred eighty-one".