39813149 has 4 divisors (see below), whose sum is σ = 39845280. Its totient is φ = 39781020.

The previous prime is 39813131. The next prime is 39813157. The reversal of 39813149 is 94131893.

It is a happy number.

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: 94131893 = 23 ⋅4092691.

It is a cyclic number.

It is not a de Polignac number, because 39813149 - 2⁸ = 39812893 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 (39813119) 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, 14129 + ... + 16710.

It is an arithmetic number, because the mean of its divisors is an integer number (9961320).

Almost surely, 2^39813149 is an apocalyptic number.

It is an amenable number.

39813149 is a deficient number, since it is larger than the sum of its proper divisors (32131).

39813149 is a wasteful number, since it uses less digits than its factorization.

39813149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32130.

The product of its digits is 23328, while the sum is 38.

The square root of 39813149 is about 6309.7661604849. The cubic root of 39813149 is about 341.4618401383.

The spelling of 39813149 in words is "thirty-nine million, eight hundred thirteen thousand, one hundred forty-nine".