39069945 has 20 divisors (see below), whose sum is σ = 70037220. Its totient is φ = 20837088.

The previous prime is 39069937. The next prime is 39069949. The reversal of 39069945 is 54996093.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10969344 + 28100601 = 3312^2 + 5301^2 .

It is not a de Polignac number, because 39069945 - 2³ = 39069937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 39069945.

It is not an unprimeable number, because it can be changed into a prime (39069949) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47830 + ... + 48639.

It is an arithmetic number, because the mean of its divisors is an integer number (3501861).

Almost surely, 2^39069945 is an apocalyptic number.

It is an amenable number.

39069945 is a deficient number, since it is larger than the sum of its proper divisors (30967275).

39069945 is an equidigital number, since it uses as much as digits as its factorization.

39069945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96486 (or 96477 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 39069945 is about 6250.5955716236. The cubic root of 39069945 is about 339.3237568001.

The spelling of 39069945 in words is "thirty-nine million, sixty-nine thousand, nine hundred forty-five".