38709131 has 4 divisors (see below), whose sum is σ = 39199200. Its totient is φ = 38219064.

The previous prime is 38709127. The next prime is 38709169. The reversal of 38709131 is 13190783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13190783 = 131 ⋅100693.

It is a cyclic number.

It is not a de Polignac number, because 38709131 - 2² = 38709127 is a prime.

It is a super-2 number, since 2×38709131² = 2996793645550322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38709101) 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, 244916 + ... + 245073.

It is an arithmetic number, because the mean of its divisors is an integer number (9799800).

Almost surely, 2^38709131 is an apocalyptic number.

38709131 is a deficient number, since it is larger than the sum of its proper divisors (490069).

38709131 is an equidigital number, since it uses as much as digits as its factorization.

38709131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490068.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 38709131 is about 6221.6662559157. Note that the first 3 decimals coincide. The cubic root of 38709131 is about 338.2759641836.

The spelling of 38709131 in words is "thirty-eight million, seven hundred nine thousand, one hundred thirty-one".