393449029 has 2 divisors, whose sum is σ = 393449030. Its totient is φ = 393449028.

The previous prime is 393448999. The next prime is 393449039. The reversal of 393449029 is 920944393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213218404 + 180230625 = 14602^2 + 13425^2 .

It is a cyclic number.

It is not a de Polignac number, because 393449029 - 2¹⁷ = 393317957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393449039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196724514 + 196724515.

It is an arithmetic number, because the mean of its divisors is an integer number (196724515).

Almost surely, 2^393449029 is an apocalyptic number.

It is an amenable number.

393449029 is a deficient number, since it is larger than the sum of its proper divisors (1).

393449029 is an equidigital number, since it uses as much as digits as its factorization.

393449029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 393449029 is about 19835.5496268694. The cubic root of 393449029 is about 732.7618086685.

The spelling of 393449029 in words is "three hundred ninety-three million, four hundred forty-nine thousand, twenty-nine".