39550145 has 4 divisors (see below), whose sum is σ = 47460180. Its totient is φ = 31640112.

The previous prime is 39550111. The next prime is 39550163. The reversal of 39550145 is 54105593.

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 28206721 + 11343424 = 5311^2 + 3368^2 .

It is a cyclic number.

It is not a de Polignac number, because 39550145 - 2²⁰ = 38501569 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3955010 + ... + 3955019.

It is an arithmetic number, because the mean of its divisors is an integer number (11865045).

Almost surely, 2^39550145 is an apocalyptic number.

It is an amenable number.

39550145 is a deficient number, since it is larger than the sum of its proper divisors (7910035).

39550145 is an equidigital number, since it uses as much as digits as its factorization.

39550145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7910034.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 39550145 is about 6288.8906016880. The cubic root of 39550145 is about 340.7082841549.

The spelling of 39550145 in words is "thirty-nine million, five hundred fifty thousand, one hundred forty-five".