39867397 has 4 divisors (see below), whose sum is σ = 42212556. Its totient is φ = 37522240.

The previous prime is 39867391. The next prime is 39867413. The reversal of 39867397 is 79376893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79376893 = 17 ⋅4669229.

It can be written as a sum of positive squares in 2 ways, for example, as 29311396 + 10556001 = 5414^2 + 3249^2 .

It is a cyclic number.

It is not a de Polignac number, because 39867397 - 2¹⁵ = 39834629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39867391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172554 + ... + 1172587.

It is an arithmetic number, because the mean of its divisors is an integer number (10553139).

Almost surely, 2^39867397 is an apocalyptic number.

It is an amenable number.

39867397 is a deficient number, since it is larger than the sum of its proper divisors (2345159).

39867397 is a wasteful number, since it uses less digits than its factorization.

39867397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345158.

The product of its digits is 1714608, while the sum is 52.

The square root of 39867397 is about 6314.0634301534. The cubic root of 39867397 is about 341.6168577269.

The spelling of 39867397 in words is "thirty-nine million, eight hundred sixty-seven thousand, three hundred ninety-seven".