38911013 has 4 divisors (see below), whose sum is σ = 39962700. Its totient is φ = 37859328.

The previous prime is 38911007. The next prime is 38911027. The reversal of 38911013 is 31011983.

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 37429924 + 1481089 = 6118^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 38911013 - 2⁴ = 38910997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38911003) 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, 525788 + ... + 525861.

It is an arithmetic number, because the mean of its divisors is an integer number (9990675).

Almost surely, 2^38911013 is an apocalyptic number.

It is an amenable number.

38911013 is a deficient number, since it is larger than the sum of its proper divisors (1051687).

38911013 is a wasteful number, since it uses less digits than its factorization.

38911013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051686.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 38911013 is about 6237.8692676266. The cubic root of 38911013 is about 338.8630216135.

Adding to 38911013 its reverse (31011983), we get a palindrome (69922996).

The spelling of 38911013 in words is "thirty-eight million, nine hundred eleven thousand, thirteen".