39140399 has 4 divisors (see below), whose sum is σ = 41200440. Its totient is φ = 37080360.

The previous prime is 39140371. The next prime is 39140441. The reversal of 39140399 is 99304193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99304193 = 1103 ⋅90031.

It is a cyclic number.

It is not a de Polignac number, because 39140399 - 2¹⁶ = 39074863 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 (39140369) 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, 1029992 + ... + 1030029.

It is an arithmetic number, because the mean of its divisors is an integer number (10300110).

Almost surely, 2^39140399 is an apocalyptic number.

39140399 is a deficient number, since it is larger than the sum of its proper divisors (2060041).

39140399 is a wasteful number, since it uses less digits than its factorization.

39140399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060040.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 39140399 is about 6256.2288161480. The cubic root of 39140399 is about 339.5275994229.

The spelling of 39140399 in words is "thirty-nine million, one hundred forty thousand, three hundred ninety-nine".