439969993 has 2 divisors, whose sum is σ = 439969994. Its totient is φ = 439969992.

The previous prime is 439969951. The next prime is 439970009. The reversal of 439969993 is 399969934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365268544 + 74701449 = 19112^2 + 8643^2 .

It is a cyclic number.

It is not a de Polignac number, because 439969993 - 2¹³ = 439961801 is a prime.

It is not a weakly prime, because it can be changed into another prime (439969193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219984996 + 219984997.

It is an arithmetic number, because the mean of its divisors is an integer number (219984997).

Almost surely, 2^439969993 is an apocalyptic number.

It is an amenable number.

439969993 is a deficient number, since it is larger than the sum of its proper divisors (1).

439969993 is an equidigital number, since it uses as much as digits as its factorization.

439969993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12754584, while the sum is 61.

The square root of 439969993 is about 20975.4616874099. The cubic root of 439969993 is about 760.5732015782.

The spelling of 439969993 in words is "four hundred thirty-nine million, nine hundred sixty-nine thousand, nine hundred ninety-three".