39694069 has 4 divisors (see below), whose sum is σ = 41062860. Its totient is φ = 38325280.

The previous prime is 39694051. The next prime is 39694073. The reversal of 39694069 is 96049693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96049693 = 19 ⋅5055247.

It can be written as a sum of positive squares in 2 ways, for example, as 27352900 + 12341169 = 5230^2 + 3513^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39694069 is a prime.

It is a super-2 number, since 2×39694069² = 3151238227553522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39694769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684352 + ... + 684409.

It is an arithmetic number, because the mean of its divisors is an integer number (10265715).

Almost surely, 2^39694069 is an apocalyptic number.

It is an amenable number.

39694069 is a deficient number, since it is larger than the sum of its proper divisors (1368791).

39694069 is a wasteful number, since it uses less digits than its factorization.

39694069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368790.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 39694069 is about 6300.3229282315. The cubic root of 39694069 is about 341.1210659355.

The spelling of 39694069 in words is "thirty-nine million, six hundred ninety-four thousand, sixty-nine".