39604993 has 2 divisors, whose sum is σ = 39604994. Its totient is φ = 39604992.

The previous prime is 39604933. The next prime is 39604997. The reversal of 39604993 is 39940693.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39538944 + 66049 = 6288^2 + 257^2 .

It is a cyclic number.

It is not a de Polignac number, because 39604993 - 2¹³ = 39596801 is a prime.

It is not a weakly prime, because it can be changed into another prime (39604997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19802496 + 19802497.

It is an arithmetic number, because the mean of its divisors is an integer number (19802497).

Almost surely, 2^39604993 is an apocalyptic number.

It is an amenable number.

39604993 is a deficient number, since it is larger than the sum of its proper divisors (1).

39604993 is an equidigital number, since it uses as much as digits as its factorization.

39604993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 39604993 is about 6293.2497964088. The cubic root of 39604993 is about 340.8657090828.

The spelling of 39604993 in words is "thirty-nine million, six hundred four thousand, nine hundred ninety-three".