39949145 has 8 divisors (see below), whose sum is σ = 48517056. Its totient is φ = 31573936.

The previous prime is 39949141. The next prime is 39949157. The reversal of 39949145 is 54194993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39949145 - 2² = 39949141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39949096 and 39949105.

It is not an unprimeable number, because it can be changed into a prime (39949141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47717 + ... + 48546.

It is an arithmetic number, because the mean of its divisors is an integer number (6064632).

Almost surely, 2^39949145 is an apocalyptic number.

It is an amenable number.

39949145 is a deficient number, since it is larger than the sum of its proper divisors (8567911).

39949145 is an equidigital number, since it uses as much as digits as its factorization.

39949145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96351.

The product of its digits is 174960, while the sum is 44.

The square root of 39949145 is about 6320.5336008916. The cubic root of 39949145 is about 341.8501931585.

The spelling of 39949145 in words is "thirty-nine million, nine hundred forty-nine thousand, one hundred forty-five".