39690369 has 6 divisors (see below), whose sum is σ = 57330546. Its totient is φ = 26460240.

The previous prime is 39690367. The next prime is 39690401. The reversal of 39690369 is 96309693.

It can be written as a sum of positive squares in only one way, i.e., 29289744 + 10400625 = 5412^2 + 3225^2 .

It is not a de Polignac number, because 39690369 - 2¹ = 39690367 is a prime.

It is a super-2 number, since 2×39690369² = 3150650782712322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39690367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2205012 + ... + 2205029.

It is an arithmetic number, because the mean of its divisors is an integer number (9555091).

Almost surely, 2^39690369 is an apocalyptic number.

It is an amenable number.

39690369 is a deficient number, since it is larger than the sum of its proper divisors (17640177).

39690369 is a wasteful number, since it uses less digits than its factorization.

39690369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4410047 (or 4410044 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 45.

The square root of 39690369 is about 6300.0292856462. The cubic root of 39690369 is about 341.1104666429.

The spelling of 39690369 in words is "thirty-nine million, six hundred ninety thousand, three hundred sixty-nine".