39493901 has 4 divisors (see below), whose sum is σ = 40141404. Its totient is φ = 38846400.

The previous prime is 39493891. The next prime is 39493903. The reversal of 39493901 is 10939493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10939493 = 2341 ⋅4673.

It can be written as a sum of positive squares in 2 ways, for example, as 8702500 + 30791401 = 2950^2 + 5549^2 .

It is a cyclic number.

It is not a de Polignac number, because 39493901 - 2¹⁴ = 39477517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39493903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323660 + ... + 323781.

It is an arithmetic number, because the mean of its divisors is an integer number (10035351).

Almost surely, 2^39493901 is an apocalyptic number.

It is an amenable number.

39493901 is a deficient number, since it is larger than the sum of its proper divisors (647503).

39493901 is an equidigital number, since it uses as much as digits as its factorization.

39493901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647502.

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

The square root of 39493901 is about 6284.4173158695. The cubic root of 39493901 is about 340.5467012017.

The spelling of 39493901 in words is "thirty-nine million, four hundred ninety-three thousand, nine hundred one".