38972149 has 4 divisors (see below), whose sum is σ = 39147136. Its totient is φ = 38797164.

The previous prime is 38972117. The next prime is 38972161. The reversal of 38972149 is 94127983.

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.

It is a cyclic number.

It is not a de Polignac number, because 38972149 - 2⁵ = 38972117 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 (38972179) 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, 87159 + ... + 87604.

It is an arithmetic number, because the mean of its divisors is an integer number (9786784).

Almost surely, 2^38972149 is an apocalyptic number.

It is an amenable number.

38972149 is a deficient number, since it is larger than the sum of its proper divisors (174987).

38972149 is a wasteful number, since it uses less digits than its factorization.

38972149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174986.

The product of its digits is 108864, while the sum is 43.

The square root of 38972149 is about 6242.7677355481. The cubic root of 38972149 is about 339.0403997530.

The spelling of 38972149 in words is "thirty-eight million, nine hundred seventy-two thousand, one hundred forty-nine".